Question

1. (l2) look at the data presented in the dot plots to the right. what comparison is true? a. class a: greater mean; class b: greater spread b. class a: greater mean; class a: greater spread c. class b: greater mean; class a: greater spread d. class b: greater mean; class b: greater spread the dot plots show the number of miles run per week for two different classes.

Explanation:

Step1: Estimate the mean

For Class A, most of the data points are clustered around 2 - 6. For Class B, most of the data points are around 6 - 10. So Class B has a greater mean as the values are generally larger.

Step2: Estimate the spread

The spread is determined by the range or the dispersion of the data. Class A has data points from 2 - 14, and Class B has data points from 4 - 12. Class A has a larger range (14 - 2=12) compared to Class B (12 - 4 = 8). So Class A has a greater spread.

Answer:

c. Class B: greater mean; Class A: greater spread