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Can I have some help with this The duration of human pregnancy is normally distributed with mean 268 days and a standard deviation of 15

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Can I have some help with this

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The duration of human pregnancy is normally distributed with mean 268 days and a standard deviation of 15 days. Find the probability that a pregnancy lasts longer than 250 days. 0.1151 0.6829 ' None of the above 0.2264 " 0.8849 c If X is a continuous random variable whose pdf is at) = x>O, what is c? (1+w)5' H4 None of the above ' 1/4

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