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The marks on a statistics midterm test are normally distributed with a mean of 75 and...

The marks on a statistics midterm test are normally distributed with a mean of 75 and a standard deviation of 6. What is the probability that a sample of 25 exams has a sample mean between 71 and 73?

a.

0.45293
b.

0.0475
c.

0.04793
d.

0.0485
e.

0.04707
math   Statistics-And-Probability   
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