PROBLEM 2 - TRAFFIC SAFETY

Situation:

The National Highway Traffic Safety Administration reported the percentage of traffic accidents occurring each day of the week. A sample of 420 accidents was collected. It is believed that the distribution of the accidents varies based on the day of the week.

Action:

Using theChi-square Goodness of fit test and either Excel or Minitab, determine whether the proportion of accidents varies among the days of the week. Use a .01 level of significance and the following observed frequencies for accidents. Use the hypothesis testing procedure appropriate for this problem to help you make a decision.

Day/Frequency

Sunday/66

Monday/50

Tuesday53

Wednesday/47

Thursday/55

Friday/69

Saturday/80

a. SHOW THE Ho AND Ha APPROPRIATE FOR THIS PROBLEM

b.WHAT IS THE P-VALUE FOR THIS PROBLEM?

c.COMPARE P-VALUE TO PROBLEM STATEMENT SPECFIED SIGNIFICANCE VALUE AND STATE WHETHER Ho SHOULD OR SHOULD NOT BE REJECTED

d.BASED ON WHETHER Ho IS REJECTED/NOT REJECTED, STATE WHETHER THE DISTRIBUTION OF THE ACCIDENTS VARIES BASED UPIN THE DAY OF THE WEEK.