Question 1: A random sample of 100 workers with children in day careshows a mean

Question

Question 1:                                                                                         

                                                                       

A random sample of 100 workers with children in day careshows a mean day-   care cost of Rs. 2,600and a standard deviation of Rs. 500. Verify the department’sthat the mean exceeds Rs. 2,500 at the 0.05 level with thisinformation.

Question 2:                                                                                                      

                                                                                   

Trying to encourage people to stop driving to campus, theuniversity claims that on average it takes people 30 minutes to ?nda parking space on campus. I don’t think it takes so long to?nd a spot. In fact I have a sample of the last ?ve times I droveto campus, and I calculated = 20. Assuming that the time it takesto ?nd a parking spot is normal, and that = 6 minutes, thenperform a hypothesis test with level = .10 to see if myclaim is correct.

Question 3:                                                                                                 

Explanation / Answer

(1) For the first question you can use t-test for singlremean. n=100 xbar=2600 s=500 =2500 =0.05 Here you have to use right tailed test. (2) For the second question you have to use z-test for singlemean. n=5 xbar=20 =6 =30 =0.10 Here you have to use left tailed test. (3) Some information is missed. Please post the questionagain n=5 xbar=20 =6 =30 =0.10 Here you have to use left tailed test. (3) Some information is missed. Please post the questionagain

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