To determine the minimum sample size
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A researcher conducted a study of the access speed of 45 hard drives and concluded that the maximum error of estimate was .28. If he were to conduct a second study to reduce the maximum error of estimate to 7, about how many hard drives should he include in his sample?
a. 720
b. 180
c. 45
d. 90
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Solution Summary
Sample size determination for a given error margin. Neat and step-by-step solution is provided.
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Maximum error of estimate = Upper limit of the error margin = SD/sqrt N
First, ...
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