One Thursday, researchers gave students enrolled in a section of basic Spanish a set of 50 new vocabulary words to memorize. On Friday, the students took a vocabulary test. When they returned to class the following Monday, they were retested—without advance warning. Both sets of test scores for the 25 students are shown below.

a) Create a graphical display to compare the two distributions of scores.
b) Write a few sentences about the scores reported on Friday and Monday.
c) Create a graphical display showing the distribution of the changes in student scores. 

d) Describe the distribution of changes.

Transcribed Image Text:

±42 4 45 Fri 44 44 4 45 4 35 45 48 45 45 47 48 38 Mon 36 43 44 40 38 37 41 46 43 31 32 37 43 41 32 44 Fri 50 34 38 43 39 46 Mon 47 34 31 40 41 32 37 36 40 31 41 32 48 39 37 31 36 41