Midterm 2 Part 2 Multiple Choice

# Midterm 2 Part 2 Multiple Choice - 1) Suppose that a 90%...

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1) Suppose that a 90% confidence interval for the population mean is [1.6,2.2]. Then a) The z score for the population mean is 0.90 b) In 90% of samples, the sample mean will be between 1.6 and 2.2 c) We are 90% confident that the sample mean is between 1.6 and 2.2 d) We are 90% confident that the population mean is between 1.6 and 2.2 2) For fixed sample size and a fixed population standard deviation, a 95% confidence interval is a) Wider than a 90% confidence interval b) More useful than a 90% confidence interval c) Narrower than a 90% confidence interval d) A better interval estimator for a population parameter than a 90% confidence interval. 3) Analysis of Variance is useful for a) Testing the equality of the means of several populations b) Testing a hypothesis about the value of the mean of a single population c) Testing a hypothesis about the variance of a population d) Testing a hypothesis about the standard deviation of a population 2) Which of the following is a property of the chi square distribution? a) Its symmetrical b) It allows for negative values of the variable c) It has only one parameter, its degrees of freedom d) It looks like a normal distribution A sample of hotdogs are analyzed for sodium and calorie content. We wish to know whether certain kinds of hotdogs (beef, meat, or poultry) have different mean levels of sodium and different mean calories. We produce the following boxplot and summary data:

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## This note was uploaded on 03/29/2008 for the course BUSINESS 06E:071 taught by Professor Bethingram during the Spring '08 term at University of Iowa.

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Midterm 2 Part 2 Multiple Choice - 1) Suppose that a 90%...

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