217 Sample Exam Questions

# 217 Sample Exam Questions - Stat 217 Sample Exam Questions...

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Stat 217 Sample Exam Questions 1. A physical trainer is interested in the recovery time (time to normal pulse rate) after a 15-minute stress test for post-open heart surgery patients. In fact, she would like to estimate the mean recovery time for all such patients. She takes 25 such patients and measures the recovery time after a 15-minute stress test for each. From these, she calculates the mean recovery time. For this situation: a) What is the population? b) What is the parameter involved? c) What is the sample? d) What is the statistic? 2. The histogram below resulted from a survey of 500 Cal Poly students who responded to the question "How much time have spent studying in the last three days?” The classes for this graph are 0 - < 2, 2 - < 4, etc. Answer the following questions with respect to this graph. 3. John Grover has been asked by management to take a sample of employees of a department store to evaluate their opinions on a new medical plan. He proposes several different sampling plans. Decide if the following sampling plans would result in a judgment, convenience, voluntary, simple random, stratified, or cluster sample.

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4. Identify each of the following as an observational study or a designed experiment. 5. For the following variables, decide i) whether they are attribute or numerical, and, if they are numerical, ii) whether they are discrete or continuous.
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