5.4.6 Assume that the given procedure yields a binomial distribution with n tria

Question

5.4.6

Assume that the given procedure yields a binomial distribution with n trials and the probability of success for one trial is p. Use the given values of n and p to find the mean mu and standard deviation sigma. Also, use the range rule of thumb to find the minimum usual value mu minus 2 sigma and the maximum usual value mu plus 2 sigma.

In an analysis of preliminary test results from a gender-selection method, 42 babies are born and it is assumed that 50% of babies are girls, so n=42 and p=0.5.

The value of the mean is mu= _________ (Simplify your answer.)

Explanation / Answer

The value of the mean is mu= n * p = 42 * 0.5 = 21 babies.

(Here, mean is the mean of a binomial distribution.)

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