Answer_Quiz_7_Form_A

Answer_Quiz_7_Form_A - STAT 250 Spring 2009 Quiz 7 Please...

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STAT 250 Spring 2009 Quiz 7 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. If the confidence level must remain constant, increase sample size. d. Decrease the sample size and increase the confidence level. 2. A confidence interval is a range of values used to estimate _______. a. the sampling distribution c. a sample statistic b. the shape of the population distribution d. a population parameter 3. Explain what the phrase 90% confident means when we interpret a 90% confidence interval for
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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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Answer_Quiz_7_Form_A - STAT 250 Spring 2009 Quiz 7 Please...

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