Question

Business Statistics class

Using the data listed below, can you conclude at the 5% level that the supplier’s assertion is correct?

Must show all work

1. The "just in time” policy of inventory control is growing in popularity. For example, General Motors spent $2 billion on its Oshawa, Ontario, plant so that it will be less than one hour from most suppliers. Suppose that an automobile parts supplier claims to deliver parts to any manufacturer in an average time of less than one hour. In an effort to test the claim, a manufacturer recorded the times of 24 deliveries from this supplier. These data are listed below. Can we conclude at the 5% level that the supplier's assertion is correct? DELIVERY TIME (IN MINUTES) 55 62 53 7 2 58 48 45 5S 63 60 61 49 58 64 57 62 si 59. 64 Si 58 61 52 69

Answer 1

page we have claim deliver parts to and manatuctured in an average time of less than one hour. In the claim contain less than greater than or not equals then it goes to altern- ative hypothesis CH) med Null hypothesis c Hol is opposite to alternative hypothesis Ho: H=60 convert thous = 60 minute HI: UZ 60 som population standard deviation is not given, so we use à test statistic to 8- Mo a sample mean .. Exi. - M; s- sumple size =24 mean under mall hypothesis sample standard deviation -|

= Page 0 57.90167 S = 6.580466 to : -1.54404 is Compute p value. Here alternative hypothesis less than sign So, plalue is Palue PC te to) - PCFL-1.64404) compute this value using - TD IS TC-164404, 231 D - value = d056884 excel syntax It gives pualue > level of sigali ticance : 0.05 There tore, we tail to reject nail hypothesis conclude that manutesterer. elei deliver part to any manutacturer in an average time is not less than one hour.