The length of human pregnancies is approximately normal with mean μ=266 days and standard deviation σ=16 days. Complete parts​ (a) through​ (f). a. What is the probability that a randomly selected pregnancy lasts less than 258 ​days? The probability that a randomly selected pregnancy lasts less than 258 days is approximately.. b. Suppose a random sample of 11 human pregnancies is obtained. Describe the sampling distribution of the sample mean length of pregnancies. The sampling distribution of x is ____ with μx= _ and σx=_    c. What is the probability that a random sample of 11 pregnancies has

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