- A professor hypothesizes that students who earn a C or betterin her class spend more time outside of class studying thanstudents who receive a D or F. She collects the following data fromtwo samples of students. What does she conclude?
Number of hours studying per week forC or better students:
8, 4, 4, 2, 1, 5, 3, 2, 3
Number of hours studying per week forD or F students:
6, 2, 1, 0, 3, 2, 1
- Null hypothesis:
- Alternative hypothesis:
- Statistical test (be specific!):
- Significance level: alpha = .05
- degrees of freedom:
- Critical region (t-value):
- Calculated t (show your work):
- Decision:
