Chapter 1.2, Problem 57E

Solution

a)

To verify the variability in creativity scores are same or different for two groups.

The variability in creativity scores are different for two groups.

Given:The overall creativity score for each poem of two groups are shown as dot plots.

  

Explanation:The creative score of students from group who wrote about internal reasons vary from 12 to 30.

The creative score of students from group who wrote about external reasons vary from 5 to 24.

Hence we conclude that the variability in creative scores are different for two groups.

b)

Whether the data suggests the external rewards promote creativity.

The data suggests that external rewards does not promote creativity.

Explanation:From the given dot plot, the creative score of group wrote about internal reasons vary from 12 to 30. The creative score of group wrote about external reasons vary from 5 to 24. As the creative scores of group who wrote about external reasons are less when compared to that of group who wrote about internal reasons. Hence we conclude the external rewards does not promote creativity.