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let x denote the duration of a randomly selected pregnancy (the time between conception and
birth). Accepted value for the mean value and standard deviation of x are 266 days and 16 days,
respectively. Suppose that a normal distribution is an appropriate model for the probability
distribution of x. What is the probability that the duration of pregnancy is between 250 and 300
days?
Solution
The probability is
P(250

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let x denote the duration of a randomly selected pregnancy (the time.pdf

  • 1. let x denote the duration of a randomly selected pregnancy (the time between conception and birth). Accepted value for the mean value and standard deviation of x are 266 days and 16 days, respectively. Suppose that a normal distribution is an appropriate model for the probability distribution of x. What is the probability that the duration of pregnancy is between 250 and 300 days? Solution The probability is P(250