Will mark brainly if correct

The overall answer of three parts :

The slope is positive. As the size of the home​ increases, the price should also increase.

(a) The variables and units in this regression are:

i) Size of homes ( x )  ( measured in \(ft^2\) )

ii) Selling price in ( y ) ( measured in dollars )

(b) Units of the slope will be :

unit of slope = dollar per square foot (i.e.  y / x )

(c) According to the above slope

The slope will be positive given that the increase of home size is directly proportional to the increase in price.

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The given question is incomplete, complete question is:

A random sample of records of sales of homes from February 15 to April 30, 1993, from the files maintained by the Albuquerque Board of Realtors gives the Price and Size (in square feet) of 117 homes. A regression to predict Price (in thousands of dollars) from Size has an R-squared of 71.4%. The residuals plot indicated that a linear model is appropriate.

Required:

a. What are the variables and units in this regression?

b. What units does the slope have?

c. Do you think the slope is positive or negative? Explain.

False. In a two-factor ANOVA, if two significant main effects emerge, it does not necessarily mean that the interaction between factors is significant. Main effects and interaction effects are independent of each other and can have different levels of significance.

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The presence of significant main effects does not necessarily indicate a significant interaction between factors in a two-factor ANOVA. It is possible for there to be significant main effects without a significant interaction.

Therefore, it is important to examine both the main effects and the interaction effects in a two-factor ANOVA to fully understand the relationship between the variables being studied.
False

In a two-factor ANOVA, there are three possible significant effects: two main effects for each factor and one interaction effect between the factors. When two significant main effects emerge, it means that there are significant differences in the levels of both factors. However, this does not automatically mean that the interaction between the factors must also be significant. The interaction effect is an entirely separate effect and can be significant or non-significant regardless of the significance of the main effects.

If two significant main effects emerge in a two-factor ANOVA, it does not necessarily mean that the interaction between factors must be significant.

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Answer:

3 parallelograms

Step-by-step explanation:

A total of 5 glove prices meet the condition of having an absolute deviation from the mean of $8 or less.

To find the mean price, we need to sum up all the glove prices and divide by the total number of gloves.

Sum of glove prices = $55 + $42 + $28 + $39 + $82 + $25 + $40 + $32 + $45 + $38 + $52 + $34 = $512

Total number of gloves = 12

Mean price = Sum of glove prices / Total number of gloves = $512 / 12 = $42.67

To find the absolute deviation of each glove price from the mean, we subtract the mean from each price and take the absolute value.

Absolute deviation from mean for each glove = |Price - Mean price|

For example, for the first glove price of $55, the absolute deviation from the mean is |$55 - $42.67| = $12.33

We want the absolute deviation to be at most $8, so we need to find how many glove prices have an absolute deviation from the mean of $8 or less.

We can calculate the absolute deviation for each glove price and count how many are less than or equal to $8.

First row:

|$55 - $42.67| = $12.33

|$42 - $42.67| = $0.67

|$28 - $42.67| = $14.67

|$39 - $42.67| = $3.67

|$82 - $42.67| = $39.33

|$25 - $42.67| = $17.67

Out of the 6 glove prices in the first row, 2 have an absolute deviation from the mean of $8 or less.

Second row:

|$40 - $42.67| = $2.67

|$32 - $42.67| = $10.67

|$45 - $42.67| = $2.33

|$38 - $42.67| = $4.67

|$52 - $42.67| = $9.33

|$34 - $42.67| = $8.67

Out of the 6 glove prices in the second row, 3 have an absolute deviation from the mean of $8 or less.

Therefore, a total of 5 glove prices meet the condition

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The given condition is incomplete, the complete question is:

a baseball player wants to buy a new glove. the table shows the prices of several gloves. the player is willing to pay the mean price with an absolute deviation of at most $8. how many of the glove prices meet this condition?

2 ( 3y + 10)

Use 2 to multiply both 3y and 10

Therefore, you have

2 x 3y + 2 x 10

6y + 20

let me know if you have any questions

Answer: 10

Step-by-step explanation:

6-5 = 1

-2 x 1 = -2

-2 x -5 = 10

Answer:i need this answer

Step-by-step explanation:

Answer:

Step-by-step explanation:

The measure of angle 7 is given as follows:

D. 130º.

Alternate interior angles happen when there are two parallel lines cut by a transversal lines.

The two alternate exterior angles are positioned on the inside of the two parallel lines, and on opposite sides of the transversal line.

Two alternate interior angles for this problem are given as follows:

<4 and <5.

The alternate interior angles are congruent, hence:

m < 4 = m < 5 = 50º.

Angles <7 and <5 form a linear pair, hence the measure of angle 7 is obtained as follows:

m < 5 + m < 7 = 180º

m < 7 = 180º - 50º

m < 7 = 130º.

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Answer:

The next term is 64, a is 2, and the common ratio is 2.

Step-by-step explanation:

Look at what's happening from each number to the next. What do you need to do to get from 2 to 4, or 4 to 8? Multiply by 2. That's your common ratio. To get the next number in the sequence, multiply the last number by the common ratio of 2. 32 x 2 = 64, so the next number in the sequence is 64. "a" is just the very first term, meaning it's 2.

Answer:

B 37.5%

Step-by-step explanation:

Answer:

x-8

Step-by-step explanation:

The angle (in radians) between vectors u and v is approximately 1.66 radians, rounded to two decimal places.

To find the angle between two vectors, we can use the dot product formula and the magnitudes of the vectors. Let's calculate the angle between vectors u and v:

Given:

u = 4i - 6j

v = 5i + 4j

Step 1: Calculate the dot product of u and v.

The dot product of two vectors u and v is given by:

u · v = |u| |v| cosθ

where |u| and |v| are the magnitudes of vectors u and v, respectively, and θ is the angle between them.

To calculate the dot product, we multiply the corresponding components of u and v and sum them:

u · v = (4 * 5) + (-6 * 4) = 20 - 24 = -4

Step 2: Calculate the magnitudes of vectors u and v.

The magnitude of a vector is given by:

|u| = √(u₁² + u₂²)

For vector u:

|u| = √((4)² + (-6)²) = √(16 + 36) = √52 ≈ 7.21

For vector v:

|v| = √((5)² + (4)²) = √(25 + 16) = √41 ≈ 6.40

Step 3: Calculate the angle θ.

Using the dot product formula mentioned earlier, we have:

-4 = (7.21)(6.40)cosθ

Solving for cosθ:

cosθ = -4 / (7.21 * 6.40) ≈ -0.086

To find θ, we can take the inverse cosine (arccos) of cosθ:

θ ≈ arccos(-0.086) ≈ 1.66 radians

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To estimate the median of the exponential distribution given the provided data, we can use two approaches: the sample median and the Maximum Likelihood Estimation (MLE).

i) The sample median is the middle value when the data is arranged in ascending order. In this case, we have 20 data points. Since there is an even number of data points, the sample median is the average of the 10th and 11th values. Arranging the data in ascending order, we find the 10th and 11th values to be 19 and 20, respectively. Therefore, the sample median is (19 + 20) / 2 = 19.5. This serves as an estimate for the unknown median of the distribution.

ii) The MLE estimate for the median of an exponential distribution is given by the formula mle_estimate = ln(2) / λ, where λ is the rate parameter. To find the MLE estimate, we need to estimate the rate parameter λ. In the case of the exponential distribution, the rate parameter is equal to the reciprocal of the mean. Therefore, we can estimate λ by taking the reciprocal of the sample mean of the provided data. The sample mean is found by summing all the data points and dividing by the total number of points, resulting in (2 + 3 + 6 + ... + 126) / 20 ≈ 33.5. Taking the reciprocal, we estimate λ to be approximately 1 / 33.5. Using this estimated λ in the MLE formula, we find the MLE estimate for the median to be ln(2) / (1 / 33.5) ≈ 23.7.

Thus, the estimated median of the exponential distribution based on the sample median is 19.5, and the estimated median based on the MLE estimate is approximately 23.7.

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Answer: sorry I don’t kno

Step-by-step explanation:

The sampling distribution of x has a mean μₓ = μ and standard deviation σₓ =​ σ/√n .

In the question, we are given that a random sample of size n is drawn from a large population with mean μ and standard deviation σ.

We are asked to find the mean and the standard deviation for the sampling distribution of the variable x for this sample.

The sample mean is regularly distributed, with a mean μₓ = μ and standard deviation σₓ = σ/√n, where n is the sample size, for samples of any size taken from populations that have a normal distribution.

Thus, the sampling distribution of x has a mean μₓ= μ and standard deviation σₓ=​ σ/√n .

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The provided question is incomplete. The complete question is:

"Fill in the blanks to correctly complete the sentence below.

Suppose a simple random sample of size n is drawn from a large population with mean μ and standard deviation σ.

The sampling distribution of x has mean μₓ =​______ and standard deviation σₓ =​______."

Answer:

84

Step-by-step explanation:

One way to solve proportions is to cross multiply. If we name the unknown value x, then we can see that:

2x = 12(14)

2x = 168

x = 84

Another way to solve proportions is to ask, what number did you multiply the first numerator by to get the second numerator. In this case, what do you have to multiply 2 with to get 14. The answer is 7, so that means you must also multiply the first denominator by 7 to get the second denominator, or in this case, the unknown value. 12 x 7 = 84, so the missing number is 84.

Hope this helped! :)

Answer:

2 1/4 square yards

Step-by-step explanation:

We have been given that Matthew and his 3 siblings are weeding a flower bed with an area of 9 square yards.    

All person weeding flower bed: .

To find the area in square yards weeded by each child, we will divide total area of flower bed by 4.

Therefore, each child weeded  square yards of flower bed.

Answer:

I believe it's going to be2 1/4 square feet

In this study, weight loss would be the dependent variable, as it is being measured or observed as a result of the change in the independent variable, which is the calorie intake (1,300 calories/day).

The independent variable is the factor that is being manipulated or changed in the study, and the dependent variable is the factor that is being measured or observed as a result of that change.

Put simply, an independent variable is just what it sounds like it is. It's a separate factor that can't be affected by the others. One independent variable could be a person's age.

In research, the independent variable might be either (1) quantitative or (2) qualitative. Variables with numeric or scalar ranges are called quantitative. They can be thought of as numerical variables that provide answers to "how many?" or "how often?"

The three primary categories of research variables are the independent variable, the dependent variable, and the controlled variables. Take the case of an automobile driving along a variety of terrains.

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True. The correlation coefficient (r) must also be positive, indicating a strong positive linear relationship between the two variables.

The correlation coefficient (r) measures the strength and direction of the linear relationship between two variables. It ranges from -1 to 1, where a value of -1 indicates a perfectly negative linear relationship, a value of 1 indicates a perfectly positive linear relationship, and a value of 0 indicates no linear relationship.  If the slope (b) of ŷ is positive, it means that as the independent variable increases, the dependent variable also increases.

In addition to the above explanation, it is important to note that while a positive slope (b) of ŷ indicates a positive linear relationship between two variables, it does not necessarily mean that the correlation coefficient (r) will always be positive. For example, if there is a weak positive linear relationship between two variables, the correlation coefficient (r) may still be positive but not as strong as if there was a strong positive linear relationship. Similarly, there may be situations where the correlation coefficient (r) is positive but the slope (b) of ŷ is not positive, such as in a curvilinear relationship where the relationship between the two variables is not linear.

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The expression data.index(20) evaluates to c) 1.

The expression data.index(20) is used to find the index position of the value 20 within the list data. In this case, data refers to the list [10, 20, 30].

When the expression is evaluated, it searches for the value 20 within the list data and returns the index position of the first occurrence of that value. In this case, the value 20 is located at index position 1 within the list [10, 20, 30]. Therefore, the expression data.index(20) evaluates to 1.

The list indexing in Python starts from 0, so the first element of a list is at index position 0, the second element is at index position 1, and so on. In our case, the value 20 is the second element of the list data, so its index position is 1.

Therefore, the correct answer is option c) 1.

It's important to note that if the value being searched is not present in the list, the index() method will raise a Value Error exception. So, it's a good practice to handle such cases by either using a try-except block or checking if the value exists in the list before calling the index() method.

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Answer:

x = -7

Step-by-step explanation:

First, we simplify:

-3x = 21

Then, we divide -3 on both sides:

x = -7

Hope this helps ^^

Answer:

Isosceles triangle.

Step-by-step explanation:

Answer:

\(\sqrt[3]{3}\)

Step-by-step explanation:

We are required to simplify the quotient: \(\dfrac{\sqrt[3]{60} }{\sqrt[3]{20}}\)

Since the numerator and denominator both have the same root index, we can therefore say:

\(\dfrac{\sqrt[3]{60} }{\sqrt[3]{20}} =\sqrt[3]{\dfrac{60} {20}}\)

\(=\sqrt[3]{3}\)

The simplified form of the given quotient is \(\sqrt[3]{3}\).

The quotient of an expression is gotten by dividing the expression by another algebraic expression

The result of the given quotient is \(\sqrt[3]{3}\)

The expression is given as:

\(\frac{\sqrt[3]{60}}{\sqrt[3]{20}}\)

Rewrite the above expression as follows:

\(\frac{\sqrt[3]{60}}{\sqrt[3]{20}} = \sqrt[3]{\frac{60}{20}}\)

Divide 60 by 20

\(\frac{\sqrt[3]{60}}{\sqrt[3]{20}} = \sqrt[3]{3}\)

Hence, the result of the given quotient is \(\sqrt[3]{3}\)

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Answer:

6

Step-by-step explanation:

Answer:

x = 5/8 = 0.625

Step-by-step explanation:

The equation is $1.75+$0.85m= $8.75, after solving the value m =8.24 miles.

An algebraic expression contains one or more variables along with numbers show the equality among them.

we use equation to determine an unknown value. we create equation based on a mathematical statement and finally solve it.

The following is the solution of equation of the statement given in question.

Given, fee per mile = $0.85

Charges = $1.75

Total cost of ride = $8.75

let, m is the number of miles travelled

Now, the equation is $1.75+$0.85m = $8.75

                  after solving     0.85m = 7.00

                             m = 8.24 miles

hence, the Uber travelled 8.24 miles

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