A random sample of n=100 observations is selected from a population with

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A random sample of n=100 observations is selected from a population with µ=30 and o=22. Approximate the probabilities shown below.

a. P(x? ?28)

b. P(22.1? x? ? 26.8)

c. P(x?? 28.2)

d. P(x?? 27.0)

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