The Small Business Administration (SBA) wishes to estimate the mean annual sales of companies that employ fewer
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(a) If the SB A wants to estimate mean annual sales to within $1000 with a probability of 0.90, how large a sample should be chosen?
(b) Suppose that the SBA has a tolerable type I error rate of 10%. It wishes to detect a difference in mean annual sales of $500 with a probability of 0.95. How large a sample should be chosen?
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Related Book For
Fundamentals of quality control and improvement
ISBN: 978-0470226537
3rd edition
Authors: amitava mitra
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