Question

A certain brand of automobile tire has a mean life span of 33 comma 000miles and a standard deviation of 2 comma

200miles. (Assume the life spans of the tires have a bell-shaped distribution.)

(a) The life spans of three randomly selected tires are 35 comma 000

miles,38 comma 000miles, and 31 comma 000miles. Find the z-score that corresponds to each life span.For the life span of 35 comma 000miles, z-score is

 

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Question

Find P(A or B or C) for the given probabilities.Upper P left parenthesis Upper A right parenthesis equals 0.35

comma Upper P left parenthesis Upper B right parenthesis equals 0.22 comma Upper P left parenthesis Upper C right parenthesis equals 0.15Upper P left parenthesis Upper A and Upper B right parenthesis equals 0.13 comma Upper P left parenthesis Upper A and Upper C right parenthesis equals 0.03 comma Upper P left parenthesis Upper B and Upper C right parenthesis equals 0.07Upper P left parenthesis Upper A and Upper B and Upper C right parenthesis equals 0.01Upper P left parenthesis Upper A or Upper B or Upper C right parenthesis equals nothing

 

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