The lengths of pregnancies in a small rural village are normally distributed with a mean of 269 days and a standard deviation of 14 days. A distribution of values is normal with a mean of 269 and a standard deviation of 14. What percentage of pregnancies last fewer than 231 days? P(X < 231 days) = %3! Enter your answer as a percent accurate to 1 decimal place (do not enter the "%" sign). Submit Question

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A: Given information: μ=100σ=15 Standard deviation rule: 68% of the data lies between μ-σ,μ+σ95% of the…

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A: Excel formula: =NORMINV(0.305,0,1)=-0.5100

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A: sample size(n)=100Mean()=703standard deviation()=92significance  level()=0.05

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