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Suppose 33 pregnant women are sampled who smoke an average of 23 cigarettes per day with...

Suppose 33 pregnant women are sampled who smoke an average of 23 cigarettes per day with a standard deviation of 10.

a) What is the probability that the pregnant women will smoke an average of 19 cigarettes or more?
probability =

b) What is the probability that the pregnant women will smoke an average of 23 cigarettes or less?
probability =

c) What is the probability that the pregnant women will smoke an average of 19 to 23 cigarettes?
probability =

d) What is the probability that the pregnant women will smoke an average of 23 to 27 cigarettes?
probability =

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