A hair salon reports that on seven randomly selected weekdays,the number of customers who visited the salon were 35, 30, 28, 12,36, 16 and 50. The population standard deviation is not given tous. Construct a 90% confidence interval for the average number ofcustomers who visit the salon on weekdays. Interpret this. Now wehave been told that we can use a normal distribution with apopulation standard deviation of 6. Construct a 95% confidenceinterval for the average number of customers who visit the salon onweekdays.
