is Question: 1 pt ou work for a consumer watchdog publication and are testing th
ID: 3050818 • Letter: I
Question
is Question: 1 pt ou work for a consumer watchdog publication and are testing the advertising claims of a tire manufact tandard deviation of 4500 miles. You test 16 tires and get the following life spans. Compiete parts (a) n 47,701 41,958 26,224 36,131 31,814 42,649 42,936 37,405 25,742 34,387 37,635 35,923 30,938 37,664 38,499 44.476 (a) Draw a trequency histogram to display these data. Use five classes. Choose the correct answer belo O A. Lite spans of tires ts it reasonable to assume that the life spans are normalty distributed? Why? Choose the correct answer be CA Yes because the histogram is neither symmetric nor bell-shaped 8. Yes, because the histogram s symmetric and bel-shaped G. No, because the histogram is nether symmetric nor bailshaped D No. because the histogram is symmeric and bel-shaped b Find the mean of your sample The means Round to one sec mal place as reeded Find the sandard deviation of your sample The standard deviationRound to one deomel prace as needec i c) Compare the mean and standard deviation of your sample weh those in the manufecturers claie Diacuss tm A The sample mean is less tran the clained mean so on aversge, the tires in the sampie lasted fer a sno had greater variation in ite span B The sampie mean i less than the ciamad mean so on Bverage the tiras in the sample lasted for a seo nad a smaler variabon in ife spanExplanation / Answer
(a) For the histogram the correct answer will be A
The life span can be assumed to be normally distributed because:
B. The histogram is symmetric and bell-shaped
(b) Mean of the Sample is : 37005.1
Standard Deviation of the sample : 6221.7
The answer for the (c) could not be done as in the problem that you have given, there no data corresponding the mean that the manufacturer claims.
Please help yourself for this part with the help of above solution.
All the best.
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