Assume that different groups of couples use a particular method of gender selection and each couple gives birth to one baby. This method is designed to increase the likelihood that each baby will be a​ girl, but assume that the method has no​ effect, so the probability of a girl is 0.5 Assume that the groups consist of 46 couples.   Part 1 a. Find the mean and the standard deviation for the numbers of girls in groups of 46 births.

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