The university of michigan's business school claims it has the highest average gpa in the big 10 among its business students. the business school claims that the business student average gpa is 3.5. your friend believes that michigan's claims are falsely inflated. in an effort to prove whether the grades are falsely inflated, your friend collects a random sample of 100 business students from michigan and gets an average gpa of 3.31 with a standard deviation of 0.3. 1.5. question 1.5 interpret 'a 5% chance of a type i error occurring' : a. an alpha level of .05 means that 5% of the time, the null hypothesis is rejected when it is actually correct. b. an alpha level of .05 means that 5% of the time, the null hypothesis is rejected when it is actually incorrect. c. an alpha level of .05 means that 5% of the time, the null hypothesis is not rejected when it is actually correct. d. an alpha level of .05 means that 5% of the time, the null hypothesis is not rejected when it is actually incorrect.

In a study of the relationship between socio-economic class and unethical behavior, 129 university of california undergraduates at berkeley were asked to identify themselves as having low or high social-class by comparing themselves to others with the most (least) money, most (least) education, and most (least) respected jobs. they were also presented with a jar of individually wrapped candies and informed that the candies were for children in a nearby laboratory, but that they could take some if they wanted. after completing some unrelated tasks, participants reported the number of candies they had taken. it was found that those who were identiď¬ed as upper-class took more candy than others. in this study, identify: (a) the cases, (b) the variables and their types, (c) the main research question, (d) identify the population of interest and the sample in this study, and (e) comment on whether or not the results of the study can be generalized to the population, and if the ď¬ndings of the study can be used to establish causal relationships.