two car owners are in need of car repairs. clive will need to pay the mechanic $2 per minute for labor, plus $234 to cover the cost of new parts. shane will need to pay $257 for parts and $1 per minute for labor. depending on how long each repair takes, the two jobs might end up costing the same amount. how much would clive and shane each have to pay? how much time would that take?

The survey of study habits and attitudes (ssha) is a psychological test that measures the motivation, attitude toward school, and study habits of students, scores range from 0 to 200. the mean score for u.s. college students is about 115, and the standard deviation is about 30. a teacher who suspects that older students have better attitudes toward school gives the ssha to 55 students who are at least 30 years of age. the mean score is 113.2. assume the population standard deviation is 30 for older students what is the margin of error for a 95% confidence interval for the population mean score for a. older students? b. compute the 95% confidence interval for the population mean score for older students. c. compute the 99% confidence interval for the population mean score for older students. d. compute the 88% confidence interval for the population mean score for older students.