Question: only choose the correct answer I want a solution quickly ,please 12 1 If the variance of a national accounting examination is 900, how large

only choose the correct answer I want a solution quickly ,please

only choose the correct answer I want a solution quickly ,please 12

12 1 If the variance of a national accounting examination is 900, how large a sample is needed to estimate ?the true mean score within 5 points with 99% confidence 240 215667 2

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