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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?
define standard deviation. their purpose,uses,advantages nd disadvantages,examples ,formula for grouped and ungrouped.
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Anna is considering investing $150,000 by dividing it into three investments. But she is not sure how much to put in each one. The first investment is known to follow a uniform dis
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Discuss the role that racism played in public policies related to urban housing throughout the twentieth century. Did this racism manifest itself solely on an individual level (i.e
Mention the characteristics of Statistics. Explain any two applications of Statistics.
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(39.75-(39)/2/(sqrt+25))
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