In crash tests at 5 miles per hour, the mean bumper repair cost for 14 randomly selected small cars is $473 with a standard deviation of $190. In similar tests of 23 randomly selected midsize cars,...

Incrash tests at 5 miles per hour, the mean bumper repair costfor 14 randomly selected small cars is $473 witha standard deviation of $190. In similartests of 23 randomly selected midsize cars, themean bumper repair cost is $741 witha
standard deviation of $205. At a=.1, can you conclude that the mean bumper cost is less for small cars than it is for midsize cars? Assume the population variances are not equal.