8. If a researcher wants to estimate the mean height for students at a college within 1 inch with 90% confidence, what i
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8. If a researcher wants to estimate the mean height for students at a college within 1 inch with 90% confidence, what i
8. If a researcher wants to estimate the mean height for students at a college within 1 inch with 90% confidence, what is the minimum sample size needed if previous studies indicate a standard deviation of 4.9 inches?
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