(note: for this assessment use anova only in those comparisons where there are more than 2 independent groups. for each of the following scenarios choose the test that is most appropriate). the u. s. department of transportation provides estimated number of miles that residents of large metropolitan areas travel per day in a car. in a random sample of 50 city a residents the mean was 22 miles with a standard deviation of 4 miles, and in a random sample of 50 city b residents the mean was 28 miles with a standard deviation of 8 miles. you want to know if the mean difference in number of miles travelled per day between city a and city b is different from zero in the population.