Determine the probability (assuming normal distribution) that a tire could be used reliably for less than 45,000 miles.

What will be an ideal response?


The value 45000 is above the mean value and the z value corresponding to 45000 is determined from



A = 0.1217. Therefore, the probability that a tire could be used reliably for less than 45000 miles is 0.5+0.1217= 0.6127

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