The mean shopping time for women with kids is 7.3 minutes. A random sample of women with children in a shopping store gave the following shopping times in minutes:
7.7 8.1 8.2 9.0 5.8 9.3 8.4 6.9 12.1 9.4
8.1 6.2 7.3 7.9 8.2 8.5 7.2 6.3 9.1 8.8
a) Verify that mean=8.1 minutes and s=1.4 min
b) Assume the shopping time followed an approximately normal distribution. Use a 5% level of significance to test the claim that the average shopping time foe women with children in Carson mall is higher than the national average for this type of store.
Excel spreadsheet verifies the mean and standard deviation of a data set around how long women with children in tow spend in a shop, then uses a 5% significance level to test whether these times are higher than the national average in the Carson mall.