The percentage of females who do not satisfy the minimum score requirement of 925 on the SAT-I test is 35.9%.
Calculating the z-score for the minimum score requirement:
z = (X - Mean) / Standard Deviation
z = (925 - 998) / 202
z = -73 / 202 ≈ -0.361
Now, using the z-score to find the percentage of females below the minimum score:
Since the z-score is -0.361, we can use a z-table (or an online calculator) to find the area to the left of this z-score, which represents the percentage of females who scored below 925. The area to the left of -0.361 is approximately 0.359.
3. Convert the area to a percentage:
Percentage = Area * 100
Percentage = 0.359 * 100 ≈ 35.9%
So, approximately 35.9% of females do not satisfy the minimum score requirement of 925 on the SAT-I test.
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determine the slope of the line?
Answer:
C
Step-by-step explanation:
m=rise/run
rise is 1
run is 4
1/4=0.25
hope this helps :3
if it did pls mark as brainliest
1) Which expression is equivalent to 4 - (-7)?A 7 + 4B 4 - 7C-7-4D - 4 + 7
Answer:
\(4-(-7)=7+4\)Explanation:
Given the expression;
\(4-(-7)\)simplifying;
\(-\times-=+\)we have;
\(4+7=7+4\)Therefore;
\(4-(-7)=7+4\)A farmer paid $500 per month for deliveries over 10 months. For the other 2 months of the year, he paid $600 per
month. Which numerical expression can be used to find the total the farmer paid for deliveries this year?
Answer:
500(10) + 600(2)
Step-by-step explanation:
Expanding a garden. The dimensions are 25 feet by 25 feet. I bought 10 cubic yards of soil. How many inches thick will the new dirt cover
Answer:
The thickness of the new dirt cover is 0.144 yards.
Step-by-step explanation:
Dimension of garden = 25 feet by 25 feet.
Volume of soil bought = 10 cubic yards
Volume = length x width x height
But,
1 foot = 0.333333 yard
So that,
25 feet = 25 x 0.333333
= 8.33333 yards
The new dimension of the garden = 8.33333 yards by 8.33333 yards.
Let the thickness of the new dirt cover be represented by h.
Thus,
Volume = 8.33333 x 8.33333 x h
10 = 69.44439 x h
h = \(\frac{10}{69.44439}\)
= 0.144
h = 0.144 yards
The thickness of the new dirt cover is 0.144 yards.
I NEED HELP ON THIS ASAP!!!!
In the two functions as the value of V(x) increases, the value of W(x) also increases.
What is the value of the functions?The value of functions, V(x) and W(x) is determined as follows;
for h(-2, 1/4); the value of the functions is calculated as follows;
v(x) = 2ˣ ⁺ ³ = 2⁻²⁺³ = 2¹ = 2
w(x) = 2ˣ ⁻ ³ = 2⁻²⁻³ = 2⁻⁵ = 1/32
for h(-1, 1/2); the value of the functions is calculated as follows;
v(x) = 2ˣ ⁺ ³ = 2² = 4
w(x) = 2ˣ ⁻ ³ = 2⁻⁴ = 1/16
for h(0, 1); the value of the functions is calculated as follows;
v(x) = 2ˣ ⁺ ³ = 2³ = 8
w(x) = 2ˣ ⁻ ³ = 2⁻³ = 1/8
for h(1, 2); the value of the functions is calculated as follows;
v(x) = 2ˣ ⁺ ³ = 2⁴ = 16
w(x) = 2ˣ ⁻ ³ = 2⁻² = 1/4
for h(2, 4); the value of the functions is calculated as follows;
v(x) = 2ˣ ⁺ ³ = 2⁵ = 32
w(x) = 2ˣ ⁻ ³ = 2⁻¹ = 1/2
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In a normal distribution, x = 3 and z = 0.67. This tells you that x = 3 is ____ standard deviations to the ____ (right or left) of the mean.
In a normal distribution, x = 3 and z = 0.67. This tells us that x = 3 is 0.67 standard deviations to the right of the mean.
Here's why:
In a normal distribution, the z-score is the number of standard deviations from the mean.
The formula for converting a value to a z-score is:
z = (x - μ) / σ
where z is the z-score, x is the value, μ is the mean, and σ is the standard deviation.
In this case, we know that x = 3 and z = 0.67.
We don't know the mean or standard deviation, but we can use algebra to rearrange the formula and solve for them.
Here's how:
z = (x - μ) / σ
0.67 = (3 - μ) / σ
multiply both sides by σ:
0.67σ = 3 - μ
subtract 3 from both sides:-
-2.33 = -μ + σ
divide both sides by -1:-
2.33 = μ - σ
so the mean is 2.33 standard deviations to the left of the value x = 3.
Therefore, x = 3 is 0.67 standard deviations to the right of the mean.
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How do you solve a two step inequality on a number line?
Solving the inequalities is similar to solving equations.
Isolate the variable be doing basic operations on both sides and check the solution.
e.g.
5x + 9 < 4
subtracting 9 from both sides:
5x + 9 - 9 < 4 -9
5x < -5
dividing by 5 on both sides:
x < -1
Here , -1 is excluded,
So at number line draw open circle at -1,
then using below table we find solution on number line:
When graphing an inequality , you need to determine if the value that was solved for is in the solution set or not and which way to shade. If the sign is < or >, the value is not in the solution set and has an open circle to indicate that.
If the sign is <= or >=, the value is included and will have a closed, or filled in, circle. See the table for guidelines.
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= = Consider the multiple linear regression model y = XB+e with the usual assumptions. Show that oʻIn = Var(â) + Var(e). Conclude that no? Var(ii) + Var(es). ; n n = i=1 i=1
We can conclude that:
Var(â) = Var(ε) + Var(ε)
or equivalently:
Var(â) = Var(ε) + Var(ε)
To show that Var(â) = Var(e) + Var(ε), we start with the ordinary least squares (OLS) estimate of the coefficient vector â:
â = (X'X)^(-1)X'y
where:
â is the OLS estimate of the coefficient vector B
X is the design matrix of the independent variables
y is the vector of observed dependent variable values
Using the properties of variance, we have:
Var(â) = Var((X'X)^(-1)X'y)
Since Var(AB) = AVar(B)A' for any matrices A and B, we can rewrite the equation as:
Var(â) = (X'X)^(-1)X'Var(y)X(X'X)^(-1)
Now, under the usual assumptions of the multiple linear regression model, we have:
Var(y) = Var(XB + ε) = Var(ε) = σ²I
where σ² is the variance of the error term ε and I is the identity matrix.
Substituting this into the equation, we get:
Var(â) = (X'X)^(-1)X'(σ²I)X(X'X)^(-1)
Since (X'X)^(-1)X'X = I, we can simplify further:
Var(â) = (X'X)^(-1)(X'σ²IX)(X'X)^(-1)
Since X'X is a symmetric positive definite matrix, we can rewrite X'σ²IX as σ²X'X:
Var(â) = (X'X)^(-1)(σ²X'X)(X'X)^(-1)
Cancelling out (X'X)^(-1)(X'X), we have:
Var(â) = σ²(X'X)^(-1)
Now, recall that the residual sum of squares (RSS) is given by:
RSS = e'e = (y - Xâ)'(y - Xâ)
Expanding this expression, we have:
RSS = y'y - â'X'y - y'Xâ + â'X'Xâ
Since â'X'y and y'Xâ are scalars, we can write them as â'X'y = (â'X'y)' = y'Xâ and y'Xâ = (Xâ)'y = Xâ'y.
Substituting these into the RSS equation, we get:
RSS = y'y - 2y'Xâ + â'X'Xâ
The sum of squares decomposition states that RSS + â'X'Xâ is equal to the total sum of squares (TSS):
TSS = y'y
Therefore, we can rewrite the RSS equation as:
RSS = TSS - â'X'Xâ
Using the degrees of freedom, we can divide both sides of the equation by n - k (n is the number of observations and k is the number of independent variables) to obtain the mean squared error (MSE):
MSE = RSS / (n - k) = (TSS - â'X'Xâ) / (n - k)
The MSE is an unbiased estimate of the error variance σ². Hence, we can write:
σ² = MSE
Substituting this into the equation for Var(â), we have:
Var(â) = MSE(X'X)^(-1)
Comparing this with the equation for Var(ε), which is σ²I, we see that:
Var(ε) = σ²I = MSE(X'X)^(-1)
Therefore, we can conclude that:
Var(â) = Var(ε) + Var(ε)
or equivalently:
Var(â) = Var(ε) + Var(ε)
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Ndidi rides y km at 10 km/hr, then walks 0.5y km at 3 km/hr. She is away from. home less than 4hours. Find the range of values of y
Ndidi rides y km at 10 km/hr, then walks 0.5y km at 3 km/hr. She is away from. home less than 4hours.Range of the values of Y is =24/7
Let's call the total time spent riding and walking t hours. We know that t is less than 4 hours, so:
t = time spent riding + time spent walking < 4 hours
The time spent riding is given by y / 10 km/hr and the time spent walking is given by 0.5y / 3 km/hr. So, we can write the inequality as:
t = y / 10 + 0.5y / 3 < 4
Expanding and simplifying the expression on the left side gives:
7/6y < 4 * 6/7
Multiplying both sides by 6/7 gives:
y < 4 * 6/7 * 6/7 = 24/7
So, the range of values of y is 0 < y < 24/7 km. This means that Ndidi rode less than 24/7 km, but more than 0 km.
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The greatest value in the range
PLEASE HELP!! EASY 60 POINTS!! WILL MARK BRAINLIEST!!
1. Line PQ is a straight line.
Three similar right-angled triangles have been drawn beneath this line.
They have not been drawn to scale.
Calculate the lengths marked a and b.
Show all your reasoning in the space provided.
Answer: A=6.5 B=12
Step-by-step explanation: if they are proportional than the base would go up by 3.5 and the height will go up by 3
Answer:
A is 9 and B 12
Step-by-step explanation:
Horizontal lines goes by 1.
Vertically goes by 3.
A letter is drawn 1,000 times, at random, from the word ARABIA. There are two offers.
A) You win a dollar if the number of A's among the draws is 10 or more above the expected number.
B) You win a dollar if the number of B's among the draws is 10 or more above the expected number.
Choose one option and explain.
(i) A gives a better chance of winning than B.
(ii) A and B give the same chance of winning.
(iii) B gives better chance of winning than A.
(iv) There is not enough information to decide.
To determine which option gives a better chance of winning, we need to calculate the expected number of A's and B's in the 1,000 draws and compare it to the conditions for winning in each option.
Let's calculate the expected number of A's and B's:
Number of A's in "ARABIA": 3
Number of B's in "ARABIA": 1
Total number of letters in "ARABIA": 6
Probability of drawing an A: 3/6 = 1/2
Probability of drawing a B: 1/6
Expected number of A's in 1,000 draws: (1/2) * 1,000 = 500
Expected number of B's in 1,000 draws: (1/6) * 1,000 = 166.67
Now let's analyze the conditions for winning in each option:
Option A: You win a dollar if the number of A's among the draws is 10 or more above the expected number (500 + 10 = 510 or more).
Option B: You win a dollar if the number of B's among the draws is 10 or more above the expected number (166.67 + 10 = 176.67 or more).
Comparing the two options:
Option A requires having 510 or more A's out of the 1,000 draws.
Option B requires having 176.67 or more B's out of the 1,000 draws.
Since it is not possible to have a fraction of a letter, the number of B's will always be an integer. Therefore, it is impossible to reach the condition for winning in option B, as there can't be 176.67 B's.
Therefore, the correct answer is:
(i) Option A gives a better chance of winning than option B.
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Please help me with this
Answer:
11z + 11
Step-by-step explanation:
The price of a train ticket consists of an initial fee plus a constant fee per stop. The table compares the number of stops and the price of a ticket (in dollars). What is the initial fee?
Answer:
Initial Fee is $2.
Step-by-step explanation:
PLS I NEED HELP
What are some details from the essay "Names/Nombres" that support the central idea and Alvarez's feelings on the central idea? List at least three examples of text from the essay.
The main idea of the essay is her migration process to the United States and their interaction with Americans.
What is Julia Alvarez's essay about?Julia Alvarez's essay "names" refers to her and her family's migration process from her country of origin to the United States.
Once living in the United States, Julia identifies that American citizens do not know how to pronounce their names correctly due to the language difference between the two societies.
This problem is reinforced by these arguments:
At the hotel my mother was Missus Alburest, and I was a little girl, as in, “Hey, little girl, stop riding the elevator up and down. It's not a toy." the super called my father Mister Alberase.But at school I was Judy or Judith, and once an English teacher mistook me for Juliet.Learn more about essays in: https://brainly.com/question/1556386
Marissa went to the store with $20 and returned home with $5.36. If she bought only 3 gallons of ice cream, what was the cost of each gallon of ice cream?
Answer: $4.88
Explanation: $20.00-$5.36= $14.64
$14.64÷3= $4.88
Solve the following quadratic equation for all values of x in simplest form.
3(x-5)^2=33
The value of x for the given quadratic expression is x = 5 ± √11.
What is an expression?The mathematical expression combines numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.
Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also denote the logical syntax's operation order and other properties.
Given expression is 3(x-5)²=33. The value of x will be calculated as,
3(x-5)²=33
(x - 5 )² = 11
(x - 5 ) = ±√11
x = 5 ± √11
Therefore, the value of x for the given quadratic expression is x = 5 ± √11.
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............
..7xy4 x 4x3y3
Answer Reformatting the input :
Changes made to your input should not affect the solution:
(1): "y4" was replaced by "y^4". 2 more similar replacement(s).
STEP
1
:
Equation at the end of step 1
0-(((4•(x3))•(y2))•7xy4)
STEP
2
:
Equation at the end of step
2
:
0 - ((22x3 • y2) • 7xy4)
STEP
3
:
Final result :
( -22•7x4y6)
evaluate the integral. 1 (7 − 8v3 16v7) dv 0
The evaluated integral is: ∫₀¹ (7 - 8v³ + 16v⁷) dv = 7.
To clarify, the integral we are evaluating is:
∫₀¹ (7 - 8v³ + 16v⁷) dv
To evaluate this integral, follow these steps:
Step 1: Break the integral into smaller integrals for each term:
∫₀¹ 7 dv - ∫₀¹ 8v³ dv + ∫₀¹ 16v⁷ dv
Step 2: Integrate each term separately:
For the first integral: ∫₀¹ 7 dv = 7v | evaluated from 0 to 1
For the second integral: ∫₀¹ 8v³ dv = (8/4)v⁴ | evaluated from 0 to 1
For the third integral: ∫₀¹ 16v⁷ dv = (16/8)v⁸ | evaluated from 0 to 1
Step 3: Evaluate each term at the bounds (1 and 0) and subtract:
7(1) - 7(0) = 7
(8/4)(1)⁴ - (8/4)(0)⁴ = 2
(16/8)(1)⁸ - (16/8)(0)⁸ = 2
Step 4: Combine the results:
7 - 2 + 2 = 7
So the evaluated integral is:
∫₀¹ (7 - 8v³ + 16v⁷) dv = 7
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Find the mean, median, and mode(s) for the given sample data. Round to two decimal places as needed. The amount of time in hours) that Sam studied for an exam on each of the last five days is 6) given below. 2.7 8.3 6.8 2.1 5.1 mean - 5 median - 5.1 mode - All valves appeared just once
The mean = 5, median = 5.1, and mode(s) = All values appeared just once.
The given data shows the amount of time in hours that Sam studied for an exam on each of the last five days: 2.7, 8.3, 6.8, 2.1, 5.1. To find the mean, median, and mode(s) for the given sample data, the following steps can be taken:Mean: The formula to find the mean is given as: Mean = (Sum of all the values) / (Total number of values). Therefore, Mean = (2.7 + 8.3 + 6.8 + 2.1 + 5.1) / 5= 25 / 5= 5.Therefore, the mean is 5.Median: The median is the middle value in an ordered set of data.To find the median: Step 1: Order the data from least to greatest. 2.1, 2.7, 5.1, 6.8, 8.3Step 2: Identify the middle value. Since we have an odd number of data values, the median is the middle value. Therefore, the median is 5.1.Mode: The mode is the value that occurs most frequently in a set of data. There are no values that appear more than once in this set of data. Therefore, all values appeared just once. Hence, there is no mode(s) for the given data set.
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The mean, median, and mode(s) for the given sample data are:
Mean = 5
Median = 5.1
Mode = There is no mode(s) in the sample data set
Solution:
The given sample data (in hours) that Sam studied for an exam on each of the last five days are as follows:2.7, 8.3, 6.8, 2.1, and 5.1
Mean: The mean of the sample data can be calculated by adding up all the values in the sample and dividing by the number of observations. The formula for calculating the mean is:Mean = Sum of all the observations / Number of observations
In this case, we have five observations, so we can calculate the mean as follows:
Mean = (2.7 + 8.3 + 6.8 + 2.1 + 5.1) / 5
Mean = 25 / 5
Mean = 5
Therefore, the mean of the given sample data is 5.
Median: The median is the middle value of the sorted observations. To find the median, we need to sort the observations in ascending order, and then determine the middle value. If there are an even number of observations, then the median is the average of the two middle values.In this case, we have five observations. When we sort them in ascending order, we get:
2.1, 2.7, 5.1, 6.8, 8.3
Since we have an odd number of observations, the median is simply the middle value, which is 5.1.
Therefore, the median of the given sample data is 5.1.
Mode: The mode is the observation that appears most frequently in the sample. If there are multiple observations that appear with the same frequency, then there can be multiple modes.In this case, each observation appears only once. Therefore, there is no observation that appears more frequently than the others. As a result, there is no mode(s) in this sample data set.
Therefore, the mode of the given sample data is all values appeared just once.
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flor ha colocado ¹1/4 kg de papa sobre una balanza . si un cliente le quiere comprar 2 kg de papa , ¿cuantos kilogramos (kg) de papa debe agregar flor sobre l balanza para cumplir con el pedido?
a)3/4 kg de papa
b)¹ 3/4 kg de papa
c1/4 kg de papa
d)¹ 1/4
RAPIDO POR FAVOR E UN EXAMEN SALVEMME LA VIDA
Answer:
a). 3/4 kg de papa
Step-by-step explanation:
Given that,
Patata colocada en balanza = 1 1/4 Kg
Flor de papa total quiere = 2 kg
Encontrar,
Se agregará más peso en la báscula para que sea de 2 kg =?
Procedimiento:
Peso requerido para ser colocado = Peso total - peso colocado
= 2 - \(1\frac{1}{4}\)
= 2 - 5/4
= (8 - 5)/4
= 3/4 kg
If sin(0) > 0, then in which quadrants could 0 lie? Select all correct answers.
Select all that apply:
Quadrant I
Quadrant II
Quadrant III
Quadrant IV
If sin(θ) > 0, then θ could lie in Quadrant I or Quadrant II, as the sine function is positive in these quadrants. Your answer: Quadrant I.
If sin(0) > 0, it means that the sine of 0 degrees is greater than 0. However, in reality, sin(0) = 0, not greater than 0. The sine function gives the vertical coordinate of a point on the unit circle corresponding to a given angle. At 0 degrees, the point lies on the positive x-axis, and its y-coordinate (sine value) is 0.
Since sin(0) = 0, it does not satisfy the condition sin(0) > 0. Therefore, 0 does not lie in any quadrants because 0 degrees falls on the positive x-axis and does not fall within any of the quadrants (Quadrant I, Quadrant II, Quadrant III, or Quadrant IV).
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solve for m:
y=3mx-8
Answer: m= y/3x + 8/3x
Step-by-step explanation:
Find the value of x.
Answer: 69
Step-by-step explanation: a triangle adds up to 180 degrees. It is an isosceles triangle (2 sides are the same angle) 180-42=138 then do 138/2=69
Determine whether the statement below is true or false. If it is false, explain. Least squares means that the square of the largest residual is as small as it could possibly be. Choose the correct answer below. O A. The statement is false. It is the sum of the squares of all the residuals that is minimized. OB. The statement is true. O C. The statement is false. It is the difference of the squares of all the residuals that is minimized.
C. The statement is false. It is the sum of the squares of all the residuals that is minimized.
In the context of least squares, the goal is to minimize the sum of the squares of the residuals, not the square of the largest residual alone. The residuals are the differences between the observed values and the corresponding predicted values obtained from a regression model.
By minimizing the sum of the squares of the residuals, the least squares method ensures that all residuals contribute to the overall measure of fit, rather than just focusing on the largest residual. This approach provides a balanced and comprehensive assessment of the overall goodness of fit between the model and the observed data.
Therefore, the statement that the square of the largest residual is as small as it could possibly be is false. The least squares method aims to minimize the sum of the squares of all the residuals, leading to the best overall fit between the model and the data.
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Which of the following functions matches this graph?
Answer:
a. y=x^2
Step-by-step explanation:
desmos graphing calculator
1. Hayley designed and sold 35 hats for $11 each. She spent $200 on making the hats. How much profit did she make? show an complete answer and how you solved it.
Answer:
185
Step-by-step explanation:
11×35=385-200= 185
pressure to increase profitability and improve operational efficiencies often drives organizations to implement new approaches and technology.
O TRUE
O FALSE
TRUE. The pressure to increase profitability and improve operational efficiencies is a common driver for organizations to implement new approaches and technology.
The pressure to increase profitability and improve operational efficiencies often drives organizations to implement new approaches and technology. By adopting innovative methods and leveraging technology, companies can streamline processes, reduce costs, and enhance their overall performance, contributing to higher profits and a competitive advantage in the market. The pressure to increase profitability and improve operational efficiencies is a common driver for organizations to implement new approaches and technology. By adopting innovative methods and leveraging technology, companies can streamline processes.
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Find 0.038 as a fraction in its lowest terms
Answer:
19 / 500
Pls mark as brainliest!!!
Answer:
19/5
Step-by-step explanation:
If you're using a scientific calculator you will be able to find this answer by just simply pressing 0.038 x 100 divided by 1
You and your friends Jamal and Carla decide to make some money during summer vacation by building and selling dog houses. To get the business started, Jamal contributes $25.55, and Carla contributes $34.45 to buy equipment and materials. You all agree that each person will earn the same amount of money after Jamal and Carla get back what they invested. Your business earns a total of $450. How much money does each person get at the end of the summer?