Stat 200 Final Exam: Part I

(To be done using Coursetalk)

Instructions: Twelve problems are given below.  Each one has a description of  a situation in which a statistical inference is to be carried out.   You are to do the following in each problem:

•   Discuss each problem with members of your fishbowl, through postings in Coursetalk.  20%  of your grade will be based on your participation.
•   On the basis of your postings/discussion, identify the statistical test/technique that should be used in the problem.  40% of your grade will be based on whether your answer is correct or not.
• Explain why you chose the statistical test/technique.  This should reflect your discussion on Coursetalk.  40% of your grade will be based on the quality of your explanation.
•   Submit your answers (choice of statistical test/technique) numbered 1 to 12, with a brief explanation of why you chose the  answer.  No answers are to be submitted via Coursetalk--only discussion occurs there.  This should be typed and submitted to me not later than 5:00 PM Friday, April 28.

Your explanations should involve the following ideas/concepts/issues:

• What type of  variables occur in the problem: categorical or numerical?
• What  are the  response and explanatory variables (if any)?
• Are comparisons being asked for? How many groups are to be compared?
•  Which measure of ‘center or location’ is being used: mean or median?
•   Is the problem concerned about  a relationship between two variables with both numerical? Or are both variables categorical?
• Other things we have talked about this semester?

Examples of statistical tests/techniques that you should think about (choose from) are inferences about one mean, two means, three or more means, tests about medians, proportions etc.

PDF file of the 12 problems