Assume that the distribution for mile running times is normal for members of college athletic teams nationwide,
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Assume that the distribution for mile running times is normal for members of college athletic teams nationwide, with a mean of 6.3 min and a standard deviation of 0.4 min. Using the formula for σM, what will σM be when
a. The local team size is 9,
b. The local team size is 16, and
c. The local team size is 25?
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