In Exercise 11.117, we discuss the random variable counting the number of girls in three babies, given
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In Exercise 11.117, we discuss the random variable counting the number of girls in three babies, given that the proportion of babies who are girls is about 0.49. Find the mean and standard deviation of this random variable.
Exercise 11.117
Worldwide, the proportion of babies who are boys is about 0.51. A couple hopes to have three children and we assume that the sex of each child is independent of the others. Let the random variable X represent the number of girls in the three children, so X might be 0, 1, 2, or 3. Give the probability function for each value of X.
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The mean is np 304...View the full answer
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Statistics Unlocking The Power Of Data
ISBN: 9780470601877
1st Edition
Authors: Robin H. Lock, Patti Frazer Lock, Kari Lock Morgan, Eric F. Lock, Dennis F. Lock
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