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AssignmentMultiple Choice
Discrete Random Variables – Mean
Question 1 • NC-Math 4
If a couple has 3 children, there are 8 possible outcomes for the number of boys and girls. Let X = the number of girls. Calculate and interpret the standard deviation of the distribution. Use 1.5 for μX.
Answer
A
The number of girls among the 3 children will typically vary from the mean by 0.25.B
The number of girls among the 3 children will typically vary from the mean by 0.125.C
The number of girls among the 3 children will typically vary from the mean by 0.75.D
The number of girls among the 3 children will typically vary from the mean by 0.866.