Key_Quiz_9_Form_A

Key_Quiz_9_Form_A - STAT 250 Spring 2009 Quiz 9 Please...

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STAT 250 Spring 2009 Quiz 9 Please write your name on your scantron form. Mark your answers on this question paper and scantron form. When you have finished the quiz, please put your scantron inside the Quiz and wait until your professor asks you to return it. Multiple Choice. Choose the one alternative that best completes the statement or answers the question. 1. Which of the following actions would reduce the width of the confidence interval? a. If confidence level must remain constant, decrease sample size. b. If sample size must remain constant, increase confidence level. c. Decrease the sample size and increase the confidence level. d. If the confidence level must remain constant, increase sample size. 2. I want to test H 0 : p = 0.27 vs. H 1 : p 0.27 using a hypothesis test. If we conclude that p is not 0.27 when in fact the true value of μ is 0.32, then we have made a _____. a. Type I error c. correct decision b. Type II error d. None of the above. 3. Which of the following is NOT a characteristic of Students’
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This note was uploaded on 02/14/2011 for the course STAT 250 taught by Professor Sims during the Spring '08 term at George Mason.

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Key_Quiz_9_Form_A - STAT 250 Spring 2009 Quiz 9 Please...

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