Stats Test 3

# Stats Test 3 - STATS TEST 3 1. Pretend you are asked to...

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STATS TEST 3 1. Pretend you are asked to test the claim that the true mean weight of a ream of paper manufactured in your factory is different from 6.5 pounds. You will have a/an. .. a) lower tail test b) upper tail test c) two tail test d) half tail test e) four tail test * 2. True or False: The null hypothesis can be proven if it is not rejected. True False * 3. Let's say we don't know the population standard deviation and we are asked to create a 90% confidence interval. Our sample size is 2. Which value most accurately represents the critical value of "t" that you would use to plug in for your interval? a) 6.314 b) 2.920 c) 3.078 d) 1.886 e) 1.638 4. Let's say we know the population standard deviation and we are asked to create a 85% confidence interval. Which value most accurately represents the critical value of Z that you would use to plug in for your interval? a) 1.40 b) 1.65 c) 1.96 d) 1.04 e)

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STATS TEST 3 1.44 1.44 * 5. If you use the sample size equation and get a result of n=19.21, how many people should you sample? a) 19.21 b) 14 c) 20 d) 1.96 e) 2.95 * 6. You are a manager at a firm and you believe your monthly costs have decreased. The costs have always been \$9,000 but you now believe they are less and would like to test this claim. If you run a hypothesis test, which of the following statements would fit your problem? a) You have an upper tail test b) Your alternative hypothesis could be stated as the population mean is less than 9,000 c) Your null hypothesis could be stated as the population mean is greater than or equal to 9,000. d)
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## This note was uploaded on 02/05/2011 for the course OPRE 201 taught by Professor Clark during the Fall '10 term at University of Baltimore.

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Stats Test 3 - STATS TEST 3 1. Pretend you are asked to...

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