Unformatted text preview: [ME326 Engineering Test Design and Analysis /
ME326 Engineering Test Design and Analysis ibo
Quiz #2 Name: 1. The sampling distribution of the means of many large samples drawn from a skewed
distribution will be skewed.
a True 2. If you had a score of 80 in a class where grading was on the curve, which foil . s normal
distribution, you would prefer to be in Class X instead of Class Y. True 0* Class X has. a mean of 75 and a standard deviation of 5.
Class Y has a mean of 76 and a standard deviation of 2. 3.  hich 0 he following is not a random sampling?
a T Vice President for Academic Affairs of Southern State University decides which
searc 5,, ”9H h proposals submitted to her by each college dean will be submitted for federal
funding consideration. b. Every student in an introductory genetics class is assigned a number. The professor then
randomly selects ten numbers and surveys the corresponding students. c. Class rosters list student names in alphabetical order. A professor wants to select some
students to participate .in a research project. The professm starts with the :3“1 name and
then selects every 10th student thereafter. d. An apartment complex manager‘randomly selects 10 buildings from the complex 30
buildings, and then interviews one household from every apartment in the 10 buildings. 4. Which of the following statements about the Central Limit Theorem (CLT) is correct?
a. The CLT states that the sample mean? is always equal to the population mean, ,u . . e CLT states that the sampling distributionof the sample mean x is approximately ormal for large sample sizes (:1 2 30).
c. The CLT states that the sample mean E is equal to the population mean u, provided that n a 30.
d. The CLT states that the sampling distribution of the population mean a is approximately normal, provided that n 2 30 5. If all possible samples of size n are drawn from a large population with a mean of 20 and a
standard deviation of 5, then the standard error of the sample mean equals 1.0 only for samples of size a. 15
b. 2
c. 5 30 Page ] of 2 ...
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