The average number of miles (in thousands) that a car's tire will function before needing replacement is 69 and the standard deviation is 12. Suppose that 47 randomly selected tires are tested. Round all answers to 4 decimal places where possible and assume a normal distribution.   d)for the 47 tires tested, find the probability that the average miles (in thousands)before need of replacement is between 68.1 and 70.1 E)NFor part d), is the assumption that the distribution is normal necessary? No OR Yes

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The average number of miles (in thousands) that a car's tire will function before needing replacement is 69 and the standard deviation is 12. Suppose that 47 randomly selected tires are tested. Round all answers to 4 decimal places where possible and assume a normal distribution.

 

d)for the 47 tires tested, find the probability that the average miles (in thousands)before need of replacement is between 68.1 and 70.1

E)NFor part d), is the assumption that the distribution is normal necessary? No OR Yes

 

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