Mathematics, 21.12.2019 06:31 barisege6030
Aschool board wishes to know the current mean reading level of 6th graders throughout a very large school district. past experience shows that the standard deviation of such reading scores is about 2.5. if they wish to be 95% sure that their result is correct to within .4, how large a sample do they need to have?
Answers: 3
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