Let the random variable x represent the number of girls in a family with three c

Question

Let the random variable x represent the number of girls in a family with three children. Assume the probability of a child being a girl is 0.39. The table on the right describes the 0 0.227 probability of having x number of girls. Determine whether the table describes a probability T 1 0435 distribution. If it does, find the mean and standard deviation. Is it unusual for a family of three 2 0.278 children to consist of three girls? 0.060 Find the mean of the random variable. Select the correct choice below and, if necessary, fill in the answer box to complete your choice O A. (Round to two decimal places as needed.) O B. The table is not a probability distribution. Find the standard deviation of the random variable. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. (Round to two decimal places as needed.) The table is not a probability distribution. to select your answer

Explanation / Answer

sum of probabilities= 0.227+0.435+0.278+0.06=2

mean=1.171

standard deviation=0.846

B. yes, because the probability of having 3 girls is greater than 0.05

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