Gender Selection in MicroSort Method

In a test of the MicroSort method of gender selection, 51 babies are born to couples trying to have baby boys, and 39 of those babies are boys (based on datafrom the Genetics & IVF Institute).

a. If the gender-selection method has no effect and boys and girls are equally likely, find the meanand standard deviationfor the number of boys born in groups of 51.
b. Is the result of 39 boys unusual? Does it suggest that the gender-selection method appears to be effective?

This solution shows step-by-step calculations to determine the mean and standard deviation as well as analyses the gender-selection method for efficacy. See attachment for full details.