Question: A professor who hates being scheduled for 8 A M classes
A professor who hates being scheduled for 8 A.M. classes, or classes on Friday afternoons after 3 P.M., has decided to investigate whether student grades are affected by the time at which classes take place. She keeps track of the grades of students who are scheduled for class at 8 A.M. on Thursdays, 4 P.M. on Fridays, and 2 P.M. on Wednesdays. The marks of these classes are not, strictly speaking, random samples. However, if we consider the population as the marks of all students who attend the professor's classes over her entire career, we could think of particular classes as random samples. Check whether the conditions for ANOVA are met. If they are, con duct a test of hypothesis at the 1% level to see if it appears that the scheduled time for classes affects the marks. Explain why you should be cautious in interpreting these results.
Relevant QuestionsThe owner of a drugstore is wondering whether the amount of a customer's purchase varies by age group. The owner runs a contest with a grand prize of a $100 gift certificate that can be used in the store. The entry ballot ...There are many factors that affect a student’s success in school. A professor is concerned that many of her students work at part-time or even full-time jobs while they are attending school. Work responsibilities leave ...Use the Tukey-Kramer procedure to identify which employees spend less time, on average, with customers before making a sale. Use a 95% confidence level. In 2009, a study showed that the percentage of online Canadians with a social network profile had increased to 56%, up from 39% in a study done 18 months previously. In 2009, 824 online Canadians were surveyed (462 indicated ...Construct a 95% confidence interval estimate for the difference in proportions of students who send acceptances after receiving offers of admission, comparing those who receive phone calls from program faculty with those who ...
Post your question