To compare the student GPAs of two different schools, 72
students of Health and Public Safety and 30 students of Business
were randomly selected and their GPA was recorded. The survey
results are summarized in the following table:
Health & Public Safety |
Business |
|
n |
72 |
30 |
Mean rating |
3.60 |
3.55 |
Sample standard deviation |
0.49 |
0.52 |
Is there sufficient evidence at the 5% significance level that Health and Public Safety have a higher GPA? Do not round intermediate calculations.
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