Question: 5

In an attempt to increase turnover by reducing the time customers occupy their seats while consuming the food and beverages they purchase the proprietor of the Kusocheck Café has removed the amusement machine and banned smoking. Before the changes she discovered that the mean time that a random sample of 15 customers spent consuming their purchases was 24.3 minutes with a standard deviation of 5.9 minutes. After the changes she found that the mean time that a random sample of 17 customers spent consuming their purchases was 19.6 minutes with a standard deviation of 7.1 minutes. Test the hypothesis that the changes have resulted in a reduction in the mean time the customers spend consuming their purchases using a 1% level of significance.