Posted by **Koia** on Thursday, May 10, 2012 at 6:08am.

A researcher conducted a study of the access speed of 40 hard drives and concluded that his

maximum error of estimate was 15. If he were to conduct a second study to reduce the

maximum error of estimate to 5, about how many hard drives should he include in his new

sample?

- statistics -
**PsyDAG**, Thursday, May 10, 2012 at 9:53am
SEm = SD/√n

15 = SD/√40 (Calculate SD and insert below.)

5 = SD/√?

- statistics -
**Anonymous**, Monday, December 5, 2016 at 5:09pm
A researcher conducted a study of the access speed of 35 hard drives and concluded that his maximum error of estimate was 35. 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 new sample?

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