Teaching reading An educator believes that new reading activities in the classroom will help elementary school pupils improve their reading ability. She recruits 44 third-grade students and randomly assigns them into two groups. One group of 21 students does these new activities for an 8-week period. A control group of 23 thirdgraders follows the same curriculum without the activities. At the end of the 8 weeks, all students are given the Degree of Reading Power (DRP) test, which measures the aspects of reading ability that the treatment is designed to improve. Comparative boxplots and summary statistics for the data from Fathom are shown below.35

(a) Based on the graph and numerical summaries, write a few sentences comparing the DRP scores for the two groups.

(b) Is the mean DRP score significantly higher for the students who did the reading activities? Give appropriate evidence to justify your answer.

(c) Can we conclude that the new reading activities caused an increase in the mean DRP score? Explain.

Transcribed Image Text:

Group Reading study Box Plot Activities Control 0 10 20 30 40 50 60 70 80 90 DRP score