Quiz: Normal Approximation to the Binomial

A binomial distribution has n = 200 and π = 0.25. Use this data for questions 1 through 4.

1. What is the mean of the distribution?
a. 6.124
b. 50
c. 100
2. If the normal approximation is used, what is the standard deviation of the distribution?
a. 6.124
b. 37.5
c. 50
3. If the normal approximation is used, what is the score for 60 successes?
a. –1.63
b. 1.41
c. 1.63
4. If the normal approximation is used, what is the probability of at least 60 successes?
a. 0.0512
b. 0.1024
c. 0.9488

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