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'l'he average number ot customers that Visited a particular store durmg the past year 15 160 per day and a standard deviation of 25 customers

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'l'he average number ot customers that Visited a particular store durmg the past year 15 160 per day and a standard deviation of 25 customers per day. A random sample of 64 days is chosen from this population. The standard deviation of the sample mean enuals

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