The operation manager at a tire manufacturing company believes that the mean mileage of a tire is 48,637 miles, with a variance of 11,282,880. What is the probability that the sample mean would differ from the population mean by less than 778 miles in a sample of 143 tires if the manager is correct

Step-by-step explanation:

Given

Required

First, we calculate the z score

So, we have:

So:

From z score probability, we have:

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answer: d.) the total number of protons and neutrons is 15

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