Question

The dot plots show two groups of lab rats (12 lab rats in each group) and the number of times each rat completed the maze.

Which of the following statements is true?


1) Group A had more variability as measured by the range.


2)Group B had more variability as measured by the range.


3)Group A had a higher average number of completions as measured by the mean.


4)Group B had a higher average number of completions as measured by the mean.

Answer 1

4)Group B had a higher average number of completions as measured by the mean.

Explanation:

Both sets have a range of:

15 - 10 = 5

In B, most of the data values are towards the right (larger values). Therefore the mean is greater of B as compared to A