Set the mean to 60.75, the standard deviation to 15.1, and the sample size to 400. What is the probability of finding a value:
a. less than 25 .
b. greater than 40.5.
c. less than 42.8 or greater than 71.8
II. Change the sample size to 100. Now that the sample size is SMALLER, find the following probabilities and compare them with those found in the first question:
a. less than 25 .
b. greater than 40.5.
c. less than 42.8 or greater than 71.8
III. Keeping the sample size at 100 and the mean at 60, try changing the standard deviation to 17.5 compare these results with the results you obtained in the second question.
a. less than 25 .
b. greater than 40.5.
c. less than 42.8 or greater than 71.8
IV. Set the mean to 45, the standard deviation to 15, and the sample size to 100. Find the following probabilities and compare them with the ones you found in the first question.
a. less than 25 .
b. greater than 40.5.
c. less than 42.8 or greater than 71.8
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