Question 1

A linear regression model estimating the relationship between Expenditure on imports ($) and Annual household income ($) is as follows:
Estimated Expenditure on Imports = 1.35 + 0.11Annual household income.
Interpret the slope.

Accepted Answer

The answer of A linear regression model estimating the relationship...

Question 2

The frequency histogram for the heights (in cm) of the 25 students in a business statistics class is given below.  What is the best measure of central location?

Accepted Answer

The answer of The frequency histogram for the heights (in...

Question 3

A linear regression model estimating the relationship between Expenditure on exports ($) and Annual household income ($) is as follows:
Estimated Expenditure on Exports = 3.55 − 0.02Annual household income
Interpret the slope.

Accepted Answer

The answer of A linear regression model estimating the relationship...

Question 4

The following data are the heights (in cm) of the 25 students in a business statistics class: $$\begin{array} { | l | l | l | l | l | l | l | l | l | l | } 
\hline 164 & 148 & 137 & 157 & 173 & 156 & 177 & 172 & 169 & 165 \
\hline 145 & 168 & 163 & 162 & 174 & 152 & 156 & 168 & 154 & 151 \
\hline 174 & 146 & 134 & 140 & 171 & & & & & \
\hline
\end{array}$$ a. Construct a box plot for the heights.
b. State the interquartile range and identify any outliers.
c. Compare the information regarding skewness conveyed by your box plot with that shown by a
histogram.

Accepted Answer

The answer of The following data are the heights (in...

Question 5

The frequency histogram for the heights (in cm) of the 25 students in a business statistics class is given below.  What is the best measure of variability?

Accepted Answer

The answer of The frequency histogram for the heights (in...

Question 6

A linear regression model estimating the relationship between Expenditure on Imports and Annual household income has a coefficient of correlation r of 0.90.
Interpret r.

Accepted Answer

The answer of A linear regression model estimating the relationship...

Question 7

A media article claimed that there was a correlation between the colour of a car and the likelihood of a car being in an accident. What is wrong with this statement?

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The answer of A media article claimed that there was...

Question 8

What is wrong with this statement:
"When the sample correlation coefficient is equal to 1 then the slope of the regression line will also be equal to 1".

Accepted Answer

The answer of What is wrong with this statement:
"When the...

Question 9

A linear regression model estimating the relationship between Expenditure on Imports and Annual household income has an R2 value of 0.81.
Interpret R2.

Accepted Answer

The answer of A linear regression model estimating the relationship...

Quiz 5: Numerical Descriptive Measures

A linear regression model estimating the relationship between Expenditure on imports ($) and Annual household income ($) is as follows: Estimated Expenditure on Imports = 1.35 + 0.11Annual household income. Interpret the slope.

The frequency histogram for the heights (in cm) of the 25 students in a business statistics class is given below. What is the best measure of central location?

A linear regression model estimating the relationship between Expenditure on exports ($) and Annual household income ($) is as follows: Estimated Expenditure on Exports = 3.55 − 0.02Annual household income Interpret the slope.

The frequency histogram for the heights (in cm) of the 25 students in a business statistics class is given below. What is the best measure of variability?

A linear regression model estimating the relationship between Expenditure on Imports and Annual household income has a coefficient of correlation r of 0.90. Interpret r.

A media article claimed that there was a correlation between the colour of a car and the likelihood of a car being in an accident. What is wrong with this statement?

What is wrong with this statement: "When the sample correlation coefficient is equal to 1 then the slope of the regression line will also be equal to 1".

A linear regression model estimating the relationship between Expenditure on Imports and Annual household income has an R2 value of 0.81. Interpret R2.