The marketing director of a large department store wants to estimate the average number of customers who
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The marketing director of a large department store wants to estimate the average number of customers who enter the store every five minutes. She randomly selects five-minute intervals and counts the number of arrivals at the store. She obtains the figures 52, 32, 41, 46, 56, 80, 45, 29, 32, and 75. The analyst assumes the number of arrivals is normally distributed. Using these data, the analyst computes a 95% confidence interval to estimate the mean value for all five-minute intervals. What interval values does she get?
Round the intermediate values to 2 decimal places. Round your answers to 2 decimal places, the tolerance is +/-0.01.
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Related Book For
Business Statistics for Contemporary Decision Making
ISBN: 978-0470910184
6th Edition
Authors: Ken Black
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