The accompanying data file reports the number of customers who visit a hair salon for seven randomly selected weekdays. It can be assumed that weekday customer visits follow a normal distribution. Customers 83 46 38 34 47 42 48 Construct the 90% confidence interval for the average number of customers who visit the salon on weekdays. Note: Round final answers to 2 decimal places. Construct the 99% confidence interval for the average number of customers who visit the salon on weekdays. Note: Round final answers to 2 decimal places.
Added by Phillip J.
Step 1
To calculate the sample mean, we need to sum up all the values and divide by the number of values. Sample mean = (83 + 46 + 38 + 34 + 47 + 42 + 48) / 7 = 338 / 7 = 48.29 (rounded to 2 decimal places) Show more…
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