0.48 The table on the right describes the probability of having x number of girl
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0.48
The table on the right describes the probability of having x number of girls. Determine whether the table describes a probability distribution. If it does, find the mean and standard deviation. Is it unusual for a family of three children to consist of three girls?
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 is0.48
The table on the right describes the probability of having x number of girls. Determine whether the table describes a probability distribution. If it does, find the mean and standard deviation. Is it unusual for a family of three children to consist of three girls?
x P(x) 0 0.141 1 0.389 2 0.359 3 0.111 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 0.48. The table on the right describe the probability of having x number of girls. Determine whether the table describes a probability distribution. If it does, find the mean and standard deviation. Is it for a family of three children to consist of three girls? Find the mean of the random variable. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. mu - (Round to two decimal places as needed.) 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. A. sigma- (Round to two decimal places as needed.) B. The table is not a probability distribution. Is it unusual for a family with three children to have only girls? A. No, because the probability of having 3 girls is greater than 0.05 B. Yes, because the probability of having 3 girls is less than or equal to 0.05 C. Yes, because the probability of having 3 girls is greater than 0.05 D. No, because the probability of having 3 girls is greater than 0.05.Explanation / Answer
To check if it' a pdf then add up all probabilities and check if they sum to 1
So, .141+.389+.359+.111 = 1.000
Which means it is a pdf function.
I cannot read the image, as it is very blurr, but if it' being in the Qn if the family consist of 3 girl then the probability is : .111
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