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.For a population with a standard deviation of = 20, how large a sample is necessary to have a standard Error that is: a. less

.For a population with a standard deviation of = 20, how large a sample is necessary to have a standard

Error that is:

a. less than or equal to 5 points?

b. less than or equal to 2 points?

c. less than or equal to 1 point?

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