Question

10 Suppose Mr. Jim Smith, a purchase manager of a big automobile manufacturer, wants to buy windshields that have an average quality rating of greater than 5,000 points, and he doesn't mind paying the price for a good quality windshield. Mr. Smith does not trust the findings of Superior Shield's previous research. To convince Mr. Smith, Superior Shields offers to pay for another study. They quality ratings from a sample of 29 quality rating of 5087. Should Mr. Smith purchase from measure consumers and find a mean Superior Shields? You can assume an a= .05 and use the standard deviation used in past research. Be sure to specify your hypotheses and show your calculations.

Answer 1

Salution Given 5000 Past Jesaa) alteornative hyfottesis Nocs to states the null and Nu yPthesis H 5000 Altes mative hyfdthesis Hi: i 7 Soo. Noa to find the test -statistic We kno that The fmula of test- staistic is given by t 5087-5000 250 V 87 Test statistic, t= .87 find the deees of feedm Nocs df= idf 28

Noc to find the P-Value Test- statistic df ] f-value 2 28 P-Value0.0360 DecisionPValue (o.0360) Theorefae (0-05) < - hyrethesis H we Jeject the nuil Conlusian There is 0.05 level of Snifiance Sufficient evidence t ieject the nl hythesis (Ho)at