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The National Quality Research Center at the University of Michigan provides a quarterly measure of consumer opinions about products and services (The Wall Street Journal, February 18, 2003). A survey of 10 restaurants in the Fast Food/Pizza group showed a sample mean customer satisfaction index of 71. Past data indicate that the population standard deviation of the index has been relatively
stable with σ = 5
a. What assumption should the researcher be willing to make if a margin of error is desired?
b. Using 95% confidence, what is the margin of error?
c. What is the margin of error if 99% confidence is desired?
I need help with the following: Find the following probabilities for the normal random variable Z: 1) P(Z>1.76) 2) P(Z 3) P(0.59=Z=2.41)
Present the survey methodology which is going to be used by describing primary and secondary data collection methods, population, sampling frame and sampling method/s, sample size
Plase give me the answers of this sets of questions.
Rocco works for an international arms dealer who has just publicly listed. What with the world being how it is these days, there's money to be made on more than just selling the to
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Data for ogive graph in sectors of indian economy
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A.Austria invested cash $1,000 and a type writer $2,500
Question 1: A mail-order firm has a circular which elicits a 10% response rate. Suppose 20 of the circulars are mailed as a market test in a new geographic area. Assuming that
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