7.8 SOC A school system has assigned several hundred

“chronic and severe underachievers”to an alternative educational experience. To assess the program, a random sample of 35 has been selected for comparison with all students in the system.

a. In terms of GPA, did the program work?

Systemwide GPA Program GPA m 5 2.47 X 52.55 s 5 0.70 n 5 35

b. In terms of absenteeism (number of days missed per year), what can be said about the success of the program?

Systemwide Program m 5 6.13 X 54.78 s 5 1.11 n 5 35

c. In terms of standardized test scores in math and reading, was the program a success?

Math Test Systemwide Math Test Program m 5 103 X5106 s 5 2.0 n 5 35 Reading Test Systemwide Reading Test Program m 5 110 X5113 s 5 2.0 n 5 35

(HINT: Note the wording of the research questions.

Is a one-tailed test justified? Is the program a success if the students in the program are no different from students systemwide?

What if the program students were performing at lower levels? If a one-tailed test is used, what form should the research hypothesis take? Where will the critical region begin?)