Question: Please provide steps and explanations 1) 2) Show that the probability density function for a normally distributed random variable has inection points at x =

Please provide steps and explanations1)2) Show that the probability density function

Please provide steps and explanations

Show that the probability density function for a normally distributed random variable has inection points at x = ,u i 0'. Lengths of human pregnancies are normally distributed with mean 268 days and standard deviation 15 days. What percentage of pregnancies last between 250 days and 280 days

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