The wall street journal reported that the average amount of time that a french person spends eating lunch at a restaurant is 22 minutes. perform a hypothesis test to determine if a difference exists between the average time an american spends eating lunch when compared to a person from france. the following data represents the time, in minutes, that random french and american diners spent at lunch. assume that the population variances are equal.

american 21 17 17 20 25 16 20 16
french 24 18 20 28 18 29 17

if population 1 is defined as french diners and population 2 is defined as american diners, the 90% confidence interval for the difference in population means is