Question

A telephone company claims that the service calls which they receive are equally distributed among the five working days of the week. A survey of 79 randomly selected service calls was conducted. Is there enough evidence to refute the telephone company's claim that the number of service calls does not change from day-to-day?

Days of the week	Mon	Tues	Wed	Thurs	Fri
Number of calls	18	14	15	18	14

Step 1 of 10 : State the null and alternative hypothesis.

Step 2 of 10 : What does the null hypothesis indicate about the proportions of service calls received each day?

Step 3 of 10 : State the null and alternative hypothesis in terms of the expected proportions for each category.

Step 4 of 10 : Find the expected value for the number of service calls received on Monday. Round your answer to two decimal places.

Step 5 of 10 : Find the expected value for the number of service calls received on Thursday. Round your answer to two decimal places.

Step 6 of 10 : Find the value of the test statistic. Round your answer to three decimal places.

Step 7 of 10 : Find the degrees of freedom associated with the test statistic for this problem.

Step 8 of 10 : Find the critical value of the test at the 0.005 level of significance. Round your answer to three decimal places.

Step 9 of 10 : Make the decision to reject or fail to reject the null hypothesis at the 0.005

level of significance.

Step 10 of 10 : State the conclusion of the hypothesis test at the 0.005 level of significance.

Answer 1

10) Ans: There is not enough evidence to refute the telephone company's claim that the number of service calls does not change from day-to-day