For a one-tailed (upper tail) hypothesis test with a sample size of 26 and a .01 level of significance, the critical value of the test statistic t is 2.797. 2.787. 2.485. 2.479.
Answers
The critical value of the test statistic t for a one-tailed (upper tail) hypothesis test with a sample size of 26 and a significance level of 0.01 is 2.479. This value is used to determine whether the sample data provides enough evidence to reject the null hypothesis in favor of the alternative hypothesis.
If the calculated test statistic is greater than 2.479, it falls into the critical region, and we reject the null hypothesis. Conversely, if the calculated test statistic is less than 2.479, it does not fall into the critical region, and we fail to reject the null hypothesis. The critical value is determined based on the desired level of significance and the degrees of freedom, which in this case is 26 - 1 = 25. For a one-tailed test with a significance level of 0.01, we need to find the t-value that corresponds to the 0.99 percentile of the t-distribution with 25 degrees of freedom. By consulting the t-distribution table or using statistical software, we find that the critical value is 2.479. This means that the calculated test statistic must be greater than 2.479 for us to reject the null hypothesis in favor of the alternative hypothesis at the 0.01 significance level in the upper tail of the distribution.
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Related Questions
8 divided by 2/7 please :)
Answers
Answer:
28
Step-by-step explanation:
8÷2/7 = 8 x 7/2 = 56/2 = 28
^Its the same as this^
Hope this helps :D
Answer:
28
Step-by-step explanation:
8÷2/7 = 8 x 7/2 = 56/2 = 28
Hope this answers your question!
compute (r) and (x) for (a) the ground state, (b) the first excited state, and (c) the second excited state of the harmonic oscillator.
Answers
To compute the values of (r) and (x) for the different states of the harmonic oscillator, we need to consider the wavefunction solutions for each state.
The wavefunctions for the harmonic oscillator are given by Hermite polynomials multiplied by a Gaussian factor. The energy eigenvalues for the harmonic oscillator are given by (n + 1/2) * h * ω, where n is the quantum number and ω is the angular frequency of the oscillator. (a) Ground State: The ground state of the harmonic oscillator corresponds to n = 0. The wavefunction for the ground state is: ψ₀(x) = (mω/πħ)^(1/4) * exp(-mωx²/2ħ), where m is the mass of the oscillator. In this state, the energy (E₀) is equal to 1/2 * h * ω. Therefore, for the ground state: (r) = 0 (since n = 0). (x) = √(ħ/(2mω)). (b) First Excited State:The first excited state corresponds to n = 1. The wavefunction for the first excited state is: ψ₁(x) = (mω/πħ)^(1/4) * √2 * (mωx/ħ) * exp(-mωx²/2ħ), where m is the mass of the oscillator. In this state, the energy (E₁) is equal to 3/2 * h * ω. Therefore, for the first excited state: . (r) = 1. (x) = √(ħ/(mω)). (c) Second Excited State:The second excited state corresponds to n = 2. The wavefunction for the second excited state is: ψ₂(x) = (mω/πħ)^(1/4) * (2(mωx/ħ)^2 - 1) * exp(-mωx²/2ħ) where m is the mass of the oscillator. In this state, the energy (E₂) is equal to 5/2 * h * ω.
Therefore, for the second excited state: (r) = 2. (x) = √(ħ/(2mω)). In summary: (a) Ground State: (r) = 0, (x) = √(ħ/(2mω)). (b) First Excited State: (r) = 1, (x) = √(ħ/(mω)). (c) Second Excited State: (r) = 2, (x) = √(ħ/(2mω)).
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using maria’s new budget, if she wanted to buy a new tv that costs $420 and wanted to do it in 6 months, how much additional money must she cut from her expenses each month?
Answers
Maria must cut an additional $70 from her expenses each month in order to save enough money to buy a new TV that costs $420 in 6 months. By allocating this additional amount towards her savings goal, she will be able to reach her target within the desired timeframe. It's important for Maria to review her budget and identify areas where she can reduce expenses in order to make room for the additional savings. This could involve cutting back on discretionary spending, finding ways to save on daily expenses, or exploring opportunities to increase her income.
Maria must cut an additional $70 from her expenses each month.
To determine how much additional money Maria must cut from her expenses each month to afford a new TV that costs $420 in 6 months, we divide the total cost by the number of months.
Additional money per month = Total cost / Number of months
Additional money per month = $420 / 6
Additional money per month = $70
With careful planning and commitment to her budget, Maria can achieve her goal of purchasing a new TV without compromising her financial stability.
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What is the volume, in cubic centimeters, of the cylinder?
A)40 cm
B)160cm
C)80cm
D)640cm
Answers
Answer:
I got around 502.65, not sure if mine is right but there is no option for it.
Step-by-step explanation:
Find the volume of the solid generated by revolving the region in the first quadrant bounded by the coordinate axes, the curve y = €* and the line * = 8 about the line x = 8.
Answers
The volume of the solid generated by revolving the region in the first quadrant bounded by the coordinate axes, the curve y = e^-x and the line x = 8 about the line x = 8 is approximately 1483.6 cubic units.
To find the volume of the solid generated by revolving the region in the first quadrant bounded by the coordinate axes, the curve y = e^-x and the line x = 8 about the line x = 8, we can use the method of cylindrical shells.
To find the volume of the solid, we need to integrate the area of each cylindrical shell over the height of the solid. Let r be the radius of a cylindrical shell at height y, and let h be the thickness of the shell. Then the volume of the shell is given by:
dV = 2πrh × h
where the factor of 2 comes from the fact that there are two cylindrical shells (one on either side of the line x = 8).
We can express r and h in terms of y:
r = 8 - y
h = e^8 - e^-x
Substituting these expressions into the formula for dV and integrating from y = 0 to y = 1, we get,
V = ∫(0 to 1) 2π(8 - y)(e^8 - e^-x) dy
= 2π ∫(0 to 1) (8e^8 - 8e^-x - ye^8 + ye^-x) dy
= 2π [8e^8 - 8e^-1 - (1/2)e^8 + (1/2)e^-1]
= 2π [15e^8 - 4e^-1]
≈ 1483.6 cubic units
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The given question is incomplete, the complete question is:
Find the volume of the solid generated by revolving the region in the first quadrant bounded by the coordinate axes, the curve y = e^-x and the line x = 8 about the line x = 8.
Triangles J K L and M N R are shown. In the diagram, ∠J ≅ ∠M and JL ≅ MR. What additional information is needed to show ΔJKL ≅ △MNR by SAS?
A. KL ≅ NR
B. ∠L ≅ ∠R
C.∠K ≅ ∠N
D.JK ≅ MN
Answers
Answer:
a on edge 2021
Step-by-step explanation:
i took the test and got 100, hope this helps:)
Answer:
I think it is D
Step-by-step explanation:
Edge
Describe in layman’s terms the consequences of misspecification
on the OLS estimators.
Answers
Misspecification of the regression model in OLS estimation can lead to biased estimates, inefficient estimates, and incorrect inference.
When the regression model used in Ordinary Least Squares (OLS) estimation is misspecified, it means that the model does not accurately represent the true relationship between the variables. Here are the consequences of misspecification on the OLS estimators:
Biased Estimates - Misspecification can lead to biased estimates of the regression coefficients. This means that the estimated coefficients will systematically deviate from the true values. The bias can cause our predictions to be inaccurate and misrepresent the relationships between variables.
Inefficient Estimates - Misspecification can result in inefficient estimates. The standard errors of the OLS estimators may be larger, indicating higher variability in the estimates. This makes the estimates less precise and reliable, making it difficult to draw accurate conclusions from the data.
Incorrect Inference - Misspecification can lead to incorrect inference. Confidence intervals, hypothesis tests, and p-values based on the OLS estimators may be invalid. This means that conclusions drawn from the statistical analysis may be misleading or inaccurate.
Therefore, misspecification of the regression model in OLS estimation can result in biased estimates, inefficient estimates, and incorrect inference. It is important to carefully choose and validate the regression model to ensure accurate and reliable results.
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A, O and B lie on a straight line segment where A=24,B=40 C=31
State the value of the angles:
i)
ii)ZOB=
iii)XOY=
iv)AOY=
v)YOZ=
Answers
Answer:
Step-by-step explanation:
Given angles measure,
m∠a = 24°
m∠b = 40°
m∠c = 31°
ii). Since, all the angles are located at a point O on a straight line AB,
Therefore, sum of all angles at point O = 180°
m∠a + m∠b + m∠c + m∠x = 180°
24° + 40° + 31° + m∠x = 180°
95° + m∠x = 180°
m∠x = 180 - 95
m∠x = 85°
ii). m∠ZOB = c = 31°
iii). m∠XOY = b = 40°
iv). m∠AOY = (a + b)°
= (24 + 40)
= 64°
v). m∠YOZ = x°
= 85°
What is the common difference between successive terms in the sequence? 0.36, 0.26, 0.16, 0.06, -0.04, -0.14, ... a) -0.1 b) -0.1, 0.1 c) -0.1, 0.2 d) 0.1
Answers
The common difference between successive terms in this sequence is -0.1.
The common difference between successive terms in a sequence is the constant value that is added or subtracted to each term to obtain the next term in the sequence. To find the common difference in the given sequence, we need to subtract each term from the term that follows it.
Subtract the first term (0.36) from the second term (0.26): 0.26 - 0.36 = -0.1
Subtract the second term (0.26) from the third term (0.16): 0.16 - 0.26 = -0.1
Subtract the third term (0.16) from the fourth term (0.06): 0.06 - 0.16 = -0.1
Based on the calculations, the common difference between successive terms in this sequence is -0.1. Therefore, the correct answer is a) -0.1.
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SOMEONE PLEASE HELP !!
Answers
Answer:
you would have to add them together
Step-by-step explanation:
you add 9pi cm^2 to 1/4
hop this helps kid
Answer:
The radius is 199.85 cm^3
What makes two terms like terms?
Answers
A number cube is rolled three times. What is the probability of rolling a number less than 3 each time?
A) 1/9
B) 1/8
C) 1/27
D) 8/27
Answers
Answer:
1/27
Step-by-step explanation:
The outcomes when rolling a die are 1,2,3,4,5,6
getting less than 3 = 1,2
P( less than 3) = outcomes of less than 3 / total
= 2/6 = 1/3
Since the events are independent we can multiply the probabilities
P( less than 3, less than 3, less than 3) = 1/3 * 1/3*1/3 = 1/27
Layla walked a total of 12 kilometers by making 4 trips to school. After 5 trips to school, how many kilometers will Layla have walked in total? Assume the relationship is directly proportional.
Answers
Answer:
\(=15km\)
Explanation:
\(12\) \(km\) ÷ \(4\)
\(=3\) \(km\) per trip to school
Now that we know that Layla walks 3 km to walk to school, we multiply that by 10
\(3\) \(km\) × \(5\) \(trips\)
\(=15\) \(km\)
∴ Layla walked 15 km in total
Rhombus ABCD has a diagonal BD¯¯¯¯¯.
m∠ADB=(4x−12)°
m∠CDB=(3x+6)°
What is the m∠ADC ?
Enter your answer in the box
º
Answers
Answer:
Solution given:
m∠ADB=(4x−12)°
m∠CDB=(3x+6)°
m∠ADC =?
Since diagonal BD bisect the angle <ADC
so
m∠ADB= m∠ADC
(4x-12)°=(3x+6)°
4x-3x=6-12
x=12+6
x=18°
again.
<ADB=m∠ADB+ m∠ADC=4×18-12+3×18+6=120°
So
the m∠ADC =120°
As it's a rhoumbus angles are equal
m<ADB=m<CDB4x-12=3x+6x=18m<ADC
4x-12+3x+67x-67(18)-6126-6120°
If 24 = 21, then which statements) can be
Postulate? MA.912.GR. 1.1
used to justify that 23 = 21?
Select all that apply.
Answers
The solution is : The reason for statement 7 is Definition of congruent angles.
Here, we have,
The given question is asking us to prove <A and <B are congruent.
<A&<B are given as supplementary angles and <A measure is given as 90 degrees.
By substitution property of Equality m<A=m<B.
From definition of congruent angles that is Congruent Angles have the same angle
we can say <A≅<B.
Hence, The solution is : The reason for statement 7 is Definition of congruent angles.
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samantha makes her own soap and sells it at a craft markets. she makes 15 bars of soap in 3 hours. If she works for 6 hours every Saturday for 4 Saturdays, how many bars of soap will she have?
Answers
Answer:
120
Step-by-step explanation:
She makes 15 in 3 hours
15÷3= 5
5 bars of soap an hour
if she works 6 hours
5x6=30
every Saturday, 4 Saturdays
30x4=120
The boundary line for the linear inequality goes through the points (-6,-4) and (3,-1). The point (9,1) is not a solution to this inequality and neither is (-4,7). Write and graph an inequality to represent the situation.
Answers
Answer:
y < \(\frac{1}{3}\) x - 2
Step-by-step explanation:
Slope of the line m = \(\frac{-4+1}{-6-3}\) = \(\frac{1}{3}\)
y + 1 = \(\frac{1}{3}\) (x - 3)
y = \(\frac{1}{3}\) x - 2
Points (9, 1) and (- 4, 7) are not solutions, then
1 < \(\frac{1}{3}\) (9) - 2
7 < \(\frac{1}{3}\) (- 4) - 2
Thus, the inequality is y < \(\frac{1}{3}\) x - 2
The average score of 100 students taking a statistics final was 70 with a standard deviation of 7. Assuming a normal distribution, what is the probability that a student scored greater than 65?
Multiple Choice
0.7611
−0.714
0.2611
0.2389
Answers
the probability that a student scored greater than 65 is 0.2389.
The probability that a student scored greater than 65 can be calculated using the standard normal distribution and the z-score. The z-score represents the number of standard deviations a value is from the mean, and can be calculated as follows:
z = (x - mean) / standard deviation
Where x is the score of interest (65)
Mean is the average score of the students (70)
Standard deviation is the standard deviation of the scores (7).
Plugging in the values, we get
z = (65 - 70) / 7 = -0.714.
Using a standard normal distribution table, we can find the probability that a student scored greater than 65 by finding the area to the right of the z-score. The probability of a student scoring greater than 65 is approximately 0.2389, or 23.89%.
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PLEASE HELP ME AND EXPLAIN!!!
Subject: Law of Cosines
Answers
Answer:
Step-by-step explanation:
just plug the numbers in to get your answer. c=90
a=55, b=50. so basically
(90)^2=(55)^2+(50)^2-2(55)(50)*cos90
Answer:
32.7°
Step-by-step explanation:
Cosine rule
\(c^2=a^2+b^2-2ab \cos C\)
Where:
a, b and c are the sides of a triangle.C is the angle opposite side c.From inspection of the given triangle:
C = Yc = XZ = 55 fta = XY = 50 ftb = YZ = 90 ftSubstitute the given values into the formula and solve for Y:
\(\begin{aligned}c^2 & =a^2+b^2-2ab \cos C\\\implies 55^2 & = 50^2+90^2-2(50)(90) \cos Y\\3025 & = 2500+8100-9000 \cos Y\\9000 \cos Y & = 2500+8100-3025\\9000 \cos Y & =7575\\\cos Y & =\dfrac{7575}{9000}\\\cos Y & =\dfrac{101}{120}\\Y & =\cos^{-1} \left(\dfrac{101}{120}\right)\\Y & = 32.68346376^{\circ}\\Y & = 32.7^{\circ} \; \sf (nearest \: tenth)\end{aligned}\)
A student earned the scores in the data set in one course.
{78, 64, 74, 92, 67}
What is the mean of the scores?
75
74
64
28
Answers
Answer:
75.
Step-by-step explanation:
The mean = (78 + 64 + 74 + 92 + 67) / 5
= 375 / 5
= 75.
Answer:A.75
Step-by-step explanation:
i did it in class
Depending on whether the results indicate a significant difference on the mean amount of money spent by customers who purchase different number of items in a visit, the shop manager would wish to investigate between which of the groups there is a statistically significant difference on the mean amount of money spent in a visit.
Which procedure would you use to assess the manager’s belief? Explain why this procedure is appropriate.
Answers
The procedure that can be used to assess the manager’s belief is the analysis of variance (ANOVA).
This procedure is appropriate because ANOVA is a statistical tool used to compare the means of three or more groups.
It can help determine if there are any statistically significant differences between the group means.
Dependent on whether the results indicate a significant difference in the mean amount of money spent by customers who purchase a different number of items in a visit, the shop manager would wish to investigate which of the groups have a statistically significant difference in the mean amount of money spent in a visit.
Hence, ANOVA is an appropriate method to do so.
Analysis of Variance (ANOVA)The analysis of variance (ANOVA) is a statistical technique used to test the null hypothesis that the means of two or more populations are equal.
ANOVA is useful for analyzing data in which there are several groups or variables.
It is used to determine whether the differences between the means of the groups are statistically significant.
The ANOVA test is based on the F-distribution.
The F-statistic is calculated by dividing the between-group variability by the within-group variability.
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A 12 ounce can of Coke costs $0.50 when purchased from the soda machine at the school. A 20 ounce bottle of Pepsi from the soda machine at the local gas station costs $1.00. Which soda is the better buy?
Answers
The 12 ounce can of Coke is the better buy, as it costs $0.50 compared to the $1.00 for the 20 ounce bottle of Pepsi.
When comparing the cost per ounce, the 12 ounce can of Coke costs approximately $0.04 per ounce ($0.50/12), while the 20 ounce bottle of Pepsi costs $0.05 per ounce ($1.00/20). Therefore, the Coke offers a lower cost per ounce, making it the more economical choice. Additionally, if we consider the volume, the 12 ounce can of Coke provides less soda compared to the 20 ounce bottle of Pepsi, meaning you would get more soda for your money with the Pepsi. However, if the goal is to minimize the cost per ounce, the 12 ounce can of Coke is the better buy.
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There are 27 cupcakes. Nine are chocolate, 7 are
vanilla and the rest are strawberry. What is the
ratio of chocolate & strawberry cupcakes to
vanilla & chocolate cupcakes?
Answers
Answer:
9/11 = 7/9
Step-by-step explanation:
9 are chocolate
27 - 16 = 11
7 are vanilla
20:16
Step-by-step explanation:
9 chocolate
7 vanilla
11 strawberry
9+11=20, 9+7=16
Find the price of a $75.00 mea with a 18% tip.
Answers
Answer:
$88.50
Step-by-step explanation:
you start by turning the decimal to a fraction by moving the decimal dot 2 places to the left so now you have 0.18
then multiply 0.18 * 75 to get 13.5
then add 15.5 + 75 to get the total meal price which is 88.5
Need help ppl keep givin me links
Answers
Answer:
∠DAB=140
∠BAC=60
∠EBF=40
∠ACB=80
∠BCG=100
Step-by-step explanation:
What is the nearest degree to ABC
Answers
Answer:
Your answer is <ABC = 156°
Step-by-step explanation:
I am not sure how to explain this, but you look at the values between 0°-180°. Starting from A right counterclockwise from 0 to C. You can see the degree.
HELPPP.
Create a table to represent the following situation: Gina is 5 years older than Sam. Gina’s age in years is x + 5, where x is Sam’s age, in years
Answers
Sam is 10 years old, and Gina is 15 years old.
Here's a table to represent the situation:
Person ║ Age
Sam ║ x
Gina ║ x+5
In this table, the first column lists the two people in the situation, Sam and Gina. The second column shows their ages in years. According to the problem statement, Gina is 5 years older than Sam, so we can represent Gina's age as x + 5, where x is Sam's age.
To find the solution, we need to use the information given in the problem statement to solve for x, which represents Sam's age. We know that Gina's age is x + 5, so we can set up an equation:
Gina's age = Sam's age + 5
x + 5 = x + 5
Simplifying the equation, we can see that x cancels out:
x + 5 - x = 5
5 = 5
This equation is always true, which means that there are infinitely many possible solutions. However, we can find a specific solution if we are given additional information. For example, if we are told that Gina is 15 years old, we can substitute x + 5 = 15 into the equation and solve for x:
x + 5 = 15
x = 10
Therefore, Sam is 10 years old, and Gina is 15 years old.
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Find the lowest common multiple of 15 and 12
Answers
Answer:
its 60
Step-by-step explanation:
Please help‼️ domain and range‼️
Answers
The domain and the range of the function are (-∝, ∝) and (0, ∝), respectively
Calculating the domain and range of the graph?From the question, we have the following parameters that can be used in our computation:
The graph
The above graph is an exponential function
The rule of an function is that
The domain is the set of all real values
In this case, the domain is (-∝, ∝)
For the range, we have
Range = (0, ∝)
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The circumference for a round pool that has a diameter of 16 feet would be?
Answers
Answer:
50.266 or 50.27
Step-by-step explanation: