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Run times at a local marathon are known to follow a left-skewed distribution with a mean...

Run times at a local marathon are known to follow a left-skewed distribution with a mean of 252 minutes and a standard deviation of 116 minutes. If we select a random sample of 59 people, what is the probability that the average run time of this sample will be between 247.469 minutes and 259.551 minutes?

Select one:

a. 0.3094

b. 0.6915

c. 0.3821

d. 0.0415

e. We cannot answer the question with the information given.

math   Statistics-And-Probability   
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Answer #1

♡n=59230 = C.L.T. can be applied. So of X: Run time at a local marathon. U=252,5=116 > Za X-ul 159 (-252) il6 - P(247.4693425

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