Question: 13. Gender Selection In a test of the MicroSort method of gender selection, 325 babies are born to couples trying to have baby girls, and

13. Gender Selection In a test of the MicroSort method of gender selection, 325 babies are born to couples trying to have baby girls, and 295 of those babies are girls (based on data from the Genetics & IVF Institute).

a. If the gender-selection method has no effect and boys and girls are equally likely, find the mean and standard deviation for the numbers of girls born in groups of 325.

b. Is the result of 295 girls unusual? Does it suggest that the gender-selection method appears to be effective?

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