Question

Lemon Corporation, an automobile manufacturer, is trying to determine the source of defects in some of its autos. Rumor has it that on Mondays large numbers of Lemon auto workers are hung over from a weekend of debauchery and are, therefore, more likely to make mistakes on the job.  In order to test the hypothesis of more defects on Mondays, the company draws a random sample of 400 automobiles made by Lemon in the last two years.   In this sample, they cross-tabulate the day the auto was made (Monday vs. all other days) with the variable of whether or not the car has any known defect. Based on the data below, is there support for her hypothesis?

      Day Car is Made:

Defective Monday   Other Days

      No 26 142

     Yes 68 162

Answer 1

Note : I have done the answer for the given data. I think there is some error in the data because the question tells that there is a sample of 400 automobiles but the data adds up to only 398. If there is any mistake, hope you can correct it using the new values. If any further doubts, you can always comment below.