W12 Mock Midterm II1

# W12 Mock Midterm II1 - STAT*2040 TERM TEST II PRACTICE...

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STAT*2040 TERM TEST II PRACTICE PACKAGE Winter 2012 DISCLAIMER This resource is not designed to be used independently of the SLG Session listed above. Please use this resource for referral only – it is supplemental review and is not meant to be a substitute for lecture or textbook material, or individual studying. This document may contain errors , which may not be apparent unless, or even if, you attend the session for which it is intended. This document has not been approved or endorsed by, nor is it affiliated with, the Department of Mathematics & Statistics. Instructions: Print out and complete the following questions. For best results, do the mock midterm under exam conditions (quiet & without notes). The solutions will be taken up in the following sessions: LEADER TIME PLACE Katherine Thursday, March 15 th 10-11:30 AM LIB 120A: (behind Research Help) Kim & Zoë Monday, March 19 th 7-10 PM LIB 384 As A Reminder… These questions are intended to be additional practice, and to work with the other resources available. Lab TA’s Prof Balka The Math and Stats Help Room (Library, Third Floor) Your Assignments, Quizzes, Lecture Notes, Course Notes

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xkcd.com 1. Which of the following statements is false? A) The standard error of the mean is the standard deviation of the sampling distribution of sample means and is represented by the symbol σ xbar . B) You can only use z as an approximation of your test statistic when σ is known, and the population you are sampling from is normally distributed. C) The larger the sample size, the smaller the margin of error. D) If x is normally distributed then xbar is normally distributed. E) None of the above 2. If Guelph housing prices are known to have a mean of \$389000 and a standard deviation of \$120000, find the probability that a randomly picked house costs more than \$400000 (assuming normal distribution). A) 0.0917 B) 0.408 C) 0.4641 D) 0.0359 E) None of the above
3. A drug company recently created a new drug that they believed would help lower blood cholesterol. This would be an important drug as it is unhealthy to have high levels of cholesterol in the blood. It is universally agreed that a blood cholesterol level of 5.7 is unhealthy. In order to test their drug, the company administered their drug to a patient with high cholesterol. The following is a series of measurements of that patient’s cholesterol after the drug was administered. 5.7, 4.5, 5.8, 4.9, 5.4, 5.2, 6.1, 5.0 Based on this information, do a hypothesis test to show whether or not this drug does in fact lower blood cholesterol at a 0.05 level of significance. Assume that

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## This note was uploaded on 03/21/2012 for the course FREN 1200 taught by Professor Pippen during the Spring '12 term at Columbia State Community College.

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W12 Mock Midterm II1 - STAT*2040 TERM TEST II PRACTICE...

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