You work for a consumer watchdog publication and are testing the advertising cla

Question

You work for a consumer watchdog publication and are testing the advertising claims of a tire manufacturer. The manufacturer claims that the life spans of the tires are normally distributed, with a mean of 40,000 miles and a standard deviation of 6500 miles. You test 16 tires and get the following life spans. Complete parts (a) through (c) below 47,523 39,222 29,670 38,505 31,197 42,766 40,365 35,418 25,574 32,503 37,955 37,371 32,841 35,965 38,218 47,250 (a) Draw a frequency histogram to display these data. Use five classes. Choose the correct answer below. OA, OC, Lif e spans of tires Life spans of tires Life spans of tires 27,7685 5,3285 27,T685 5,3285 27,T68 5 45,3285 Distance (in miles Distance (in miles) Distance (in miles) Is it reasonable to assume that the life spans are normally distributed? Why? Choose the correct answer below. O O B. ° C. O D. No, because the histogram is neither symmetric nor bell-shaped. Yes, because the histogram is neither symmetric nor bell-shaped. Yes, because the histogram is symmetric and bell-shaped. No, because the histogram is symmetric and bell-shaped.

Explanation / Answer

Solution:-

a) => option B.

=> option C.

b) => The mean is 37021.4

=> The standard deviation is 5939.4

=> option option B.

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