Assuming an Equal Chance of a New Baby Being a Boy

question 27

Multiple Choice

Assuming an equal chance of a new baby being a boy or a girl (that is, p= 0.5) , we would like to find the probability of 40 or more of the next 100 births at a local hospital will be boys.Using the normal approximation for binomial with a correction for continuity, we should use the z-score _______

• A)0.4
• B)-2.1
• C)0.6
• D)2
• E)-1.7

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