It is believed that that average exam 1 score for all Stat 218 students at UNL is an 85. One professor decided to test to see if her students average was higher than the believed average. The average exam 1 score for the 25 students in her class was a 93 with a standard deviation of 23. The distribution of grades for her class was symmetric (not skewed).

1. What variable is studied here? Classify into categorical or quantitative.

2. Describe the parameter of interest in words. Give a symbol for it.

3. What is the value of the statistic for this study? Give a symbol for it.

a) =93

b) x=93

c) =93

d) p^=93

Group of answer choices

b

c

a

d

4. Write the hypotheses for this study in words.

5. Are validity conditions satisfied for using theory-based inference approach? Why or why not?

6. Compute the theory-based standardized statistic for this study.

7. What conclusion, in context of the study would you make?

8. Can we generalize the results of this study to all Stat 218 students at UNL? Why or why not?

9. What type of error could you have made in this scenario? Write the error in context.