Stats Final Review

Interpret the residual for the young adult indicated in the scatterplot.

• This young adult exercises for 6 more hours than predicted based on the resting heart rate.

• This young adult exercises for 6 fewer hours than predicted based on the resting heart rate.

• This young adult's resting heart rate was 6 more beats per minute than predicted based on the number of hours of exercise.

• This young adult's resting heart rate was 6 fewer beats per minute than predicted based on the number of hours of exercise.

What can you conclude from this residual plot?

The scatterplot and regression line show the average income, in dollars, in several major American cities plotted against the rent for a 2-bedroom apartment in those cities.

The fitted line has a slope of 0.031.

What is the best interpretation of this slope?

• On average, each $1 increase in average income was associated with a $0.031 increase in average rent.

• On average, each $.031 increase in average income was associated with a 1 point increase in average rent.

• We would predict a city whose average income was $0 to have an average rent of $.031

• We would predict a city whose average income was $0 to have an average rent of $0.

Cars lose value the farther they are driven. Heidi was curious if she could predict a car's value based on its mileage, so she collected data about the mileage. Which of these is an appropriate least-squares equation for this model?

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Find the relative frequency marginal distribution of days the train was delayed.

• 23%

• 48%

• 10%

• 97%

What is the best description of the relationship in the scatterplot below?

• Positive Linear Association

• Negative Linear Association

• Nonlinear Association

• No Association

The graph below shows the relationship between population density (in people per square kilometer) and average rent for 1-bedroom apartments in different cities. Which statement is the best description of the association between these variables?

• Cities with higher population densities tended to have higher rents.

• Cities with higher population densities tended to have lower rents.

• There is no association between population density and

The theater director recorded the number of seats occupied at past performances and the total revenue predicting the total revenue, in dollars, from the number of seats occupied.

What is the residual of a performance with a revenue of $700 and 70 seats occupied ?

• $700

• $655

• $45

• $1,355

• A

• B

• C

• D

• E

• A

• B

• C

• D

• E