6. The fill weight of a certain brand of adult cereal is normally distributed wi

Question

6. The fill weight of a certain brand of adult cereal is normally distributed with a mean of 910 grams and a standard deviation of 5 grams. If we select one box of cereal at random from this population, what is the probability that it will weigh less than 904 grams?

A. 8849
B. 7698
C. 3849
D. 2302
E. 1151

7. If p=.1 and n=5, then the corresponding binomial distribution is

A. Left skewed
B. Right skewed
C. Symmetric
D. Bimodal

8. A person's telephone area code is an example of a(n) _____________ variable.

A. Nominal
B. Ordinal
C. Interval
D. Ratio
E. Continuous

9. In a study conducted for the State Department of Education, 30% of the teachers who left teaching did so because they were laid off. Assume that we randomly select 10 teachers who have recently left their profession. Find the probability that exactly 4 of them were laid off.

A. 0.0090
B. 0.2001
C. 0.2668
D. 0.3000

10. The mean of the binomial distribution is equal to:

A. p
B. np
C. Px(1-p)n-x
D. (n)(p)(1-p)
E. square root of (n)(p)(1-p)

Explanation / Answer

A. 8849

B. Right skewed

B. 0.2001

B. np

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