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A couple decide that they will keep having children until they have one of each sex. (stop as soon as they have both girl and boy or at 4 children regardless of sex). Ignoring the possibility of twins and suppose each trial is independent, and resuts in a boy or girl with probability 1//2. Let X be the number of children they will have.
a) What is the pmf of X?
b) What is the expected number of X or what is the mean?
Both need to be answered
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Form the cumulative percentage distribution and plan a cumulative percentage polygon.
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Determine the standard error of students that favoured the move.
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