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Exam Scores: True or False?

APSTAT-YE5ITG

These side-by-side stemplots represent the scores on the final exam for a statistics teacher’s 1st-period class $(n = 29)$ on the left and 5th-period class $(n = 22)$ on the right. The scores are raw scores, out of a possible $100$ points.

Which of the following statements is false?

A

The mean for 5th period is greater than the mean for 1st period.

B

Both groups have the same modal class.

C

5th period has less variability than 1st period.

D

1st period is skewed right.

E

1st period did worse than 5th period.