Practice Exam for Late Midterm - Open-ended Practice...

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Open-ended Practice Questions for Exam April 18 1 . A randomly selected sample of n = 16 students at a university is asked, “How much did you spend on textbooks this semester?” Computer output for analyzing the research question is Variable N Mean StDev SE Mean 95% Confidence Interval Spent 16 284.9 96.0 ________ (233.8, 336.0) a. The computer output omits the value of SE Mean--find its value. b. The formula for the confidence interval involves a multiplier t*--what are the degrees of freedom for it?. c. Specify the formula for the C.I. and substitute numbers in it (use t* = 2.13). . 2. A study was made to see if angry grumpy old men were at higher risk of developing heart disease than old men who were not angry. 199 old men without anger (group 1) were followed to see if they developed heart disease--8 did; 559 old men who had lots of anger (group 2) were obtained and it was found that 59 developed heart disease. Minitab output for analyzing the data is given below: Sample X N Sample p
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This note was uploaded on 04/07/2008 for the course STAT 200 taught by Professor Barroso,joaor during the Spring '08 term at Pennsylvania State University, University Park.

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Practice Exam for Late Midterm - Open-ended Practice...

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