Statistics as a Problem-Solving Process and the Role of Questioning — Test

Question 1

Which is a true statement regarding Springside?

Revolt · Accepted Answer

Springside weakens the correlation shown in the scatterplot.

Question 2

Based on the scatterplots, what type of model is most appropriate for comparing distance and temperature?

Revolt · Accepted Answer

A power model is appropriate because the scatterplot relating ln(distance) to ln(temperature) is roughly linear.

Question 3

How would the correlation change if the stopping distances were recorded in meters, rather than feet?

Revolt · Accepted Answer

The value of the correlation coefficient would not change.

Question 4

Using technology, what is the slope of the least-squares regression line and what is its interpretation?

Revolt · Accepted Answer

The slope is 0 point 5 0 , which means for each additional pound in weight, the child’s height is predicted to increase by 0 point 5 inches.

Question 5

Based on the graph, is there an association between favorite type of music and favorite school subject?

Revolt · Accepted Answer

There is an association because the distribution of favorite music differs among the subject groups.

Statistics as a Problem-Solving Process and the Role of Questioning — Test Answers