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A manager of a company wants to estimate the average sales of a sales man in...

A manager of a company wants to estimate the average sales of a sales man in his company with 98% level of confidence. A random sample of 100 salesmen is selected and found their average sales is Rs 750(in Lakhs). If the population deviation is Rs.150(lakhs), then find the interval estimate for average sales

Math   Statistics-And-Probability   
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