Exercise 7.3 An English teacher recognizes that students already know how to spell some of the words assigned for the weekly spelling test. This teacher wants to discover how many new words students learn. The usual assignment is 25 words per week. At the beginning of the month, the teacher administers a spelling test consisting of all 100 words that will be assigned over the month. The teacher then administers the same 100-word test at the end of the month.

Data set: Ch 07 - Exercise 03A.sav Codebook Variable: ID Definition: Student’s ID Type: Alphanumeric Variable: pretest Definition: Number of words spelled correctly at the beginning of the month Type: Continuous Variable: posttest Definition: Number of words spelled correctly at the end of the month Type: Continuous