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Find the z score

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Reference no: EM13205079

People are polled on how many books they read the previous year . How many subjects are needed to estimate the number of books read the previous year within 1 book with 95% confidence. Initial survey result indicate that σ = 12.4 books

Find the z score that has 11.7 of the distribution area to its left

 

Reference no: EM13205079

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