2201_Quiz2B

# 2201_Quiz2B - Revised 2201_Quiz2Bm EXST 2201 Quiz 2B Name...

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Revised 01/19/2010 2201_Quiz2B.docm Page 1 of 6 EXST 2201 Quiz 2B Name: Section: Score: Directions: This quiz will be available on Moodle after the Chapter 6 lectures have been given . Mark your answers on this printout. When the quiz is available on Moodle, record your answers in the Moodle quiz and submit them for grading. You may take the quiz only once and you will have an hour and a half to complete it, so be sure of your answers before you start the Moodle quiz. 1. (Question 1 subparts below) 1A. What is the most appropriate situation for the z -test? Independent data Distributed normally Known population variance All of the above. 1B. What is the magnitude of the critical value for a one-tailed z -test with significance 0.05? 2.48 1.65 1.96 0.54 1C. What is the magnitude of the critical value for a two-tailed z -test with significance 0.01? 2.33 1.65 1.96 2.58 1D. A sample of size 24 is collected, with sample average 47.1. If the population standard deviation is 12, what is the value of the test statistic to test if the population mean equals 50? –1.18 +1.65 +1.18 –1.65

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Revised 01/19/2010 2201_Quiz2B.docm Page 2 of 6 1E. A sample of size 24 is collected, with sample average 47.1. If the population standard deviation is 12, what decision would be made to test that the population mean equals 50 at significance 0.01? Reject the null. Sometimes reject the null. Reject the alternative.
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