Chapter 8 Quiz - Chapter 8 Quiz

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Chapter 8 Quiz In the estimation of the population mean when the population   σ  is unknown, to  construct a confidence interval estimate, we use the __________. z -distribution t -distribution F -distribution Chi-square  distribution A department store finds that in a random sample of 100 customers, 40% had of the  sampled customers had browsed its website prior to visiting the store. Based on this  data, a 95% confidence interval for the population proportion of customers that browse  the store's website prior to visiting the store will be between _________________ . 0.452 and 0.525 0.500 and 0.540 0.400 and 0.495 0.480 and 0.520 0.304 and 0.496 Catherine Chao, Director of Marketing Research, is evaluating consumer acceptance of  a new toothpaste package. Her staff reports that 17% of a random sample of 200  households prefers the new package to all other package designs. If Catherine  concludes that 17% of all households prefer the new package, she is using a _______. an interval estimate a statistical parameter a point estimate a range estimate an exact estimate An automobile financing company is interested in estimating how satisfied customers  are with their service. They develop a question in which a customer is ask to rate the 
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service of the company on a scale of from 1 to 10 where 1 is extremely dissatisfied and  10 is extremely satisfied. Fifty such responses are randomly selected and analyzed.  The sample mean is 7.28 and the population is 1.07. If the company concludes that the  mean satisfaction score for all of their customers is 7.28, then they are using a:
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This note was uploaded on 07/25/2011 for the course DESI 3403 taught by Professor Black during the Fall '10 term at University of Houston.

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Chapter 8 Quiz - Chapter 8 Quiz

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