1. It is believed that UNL students spend an average of $19 on haircuts. One professor decided to test if her students were spending more than the believed average. The average price of haircuts for the 25 students in her class was $26 with a standard deviation of $20. The distribution of haircuts price for her class was symmetric (not skewed).

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

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

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

a) =26

b) x=26

c) =26

d) p^=26

d. Write the hypotheses for this study in words. e. Are validity conditions satisfied for using theory-based inference approach? Why or why not?

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

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

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