# Use the information in the previous problem about

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2.Use the information in the previous problem.About what percentage of the men are over70.5 inches tall?(a) 2.5(b) 5(c) 16(d) 32(e) 68
3.For the density curve shown to the right,which statement is true?
4.For the density curve shown in Question 3, which statement is true?
5.The area under the standard Normal curve corresponding to0.3 <Z< 1.6 is
6.The graph at right is a Normal probabilityplot for the amount of rainfall (in acre-feet)obtained from 26 randomly selected cloudsthat were seeded with silver oxide.Which ofthe following statements about the shape ofthe rainfall distribution is true?(a) The distribution is Normal.(b) The distribution is approximately Normal.210-1z-score
(c) The distribution is skewed left.(d) The distribution has no potential outliers.(e) The distribution is skewed right.7.The distribution of the time it takes for different people to solve a certain crossword puzzle isstrongly skewed to the right, with a mean of 30 minutes and a standard deviation of 15minutes.The distribution ofz-scores for those times is25002000150010005000-2Rainfall (acre-feet)
8.The cumulative relative frequency graph at rightshows the distribution of lengths (incentimeters) of fingerlings at a fish hatchery.The interquartile range for this distribution isapproximately:1.00.80.60.4Cumulative relative frequency0.29876540.0Lengths (cm.)
9.Which of the following properties is true for all Normal density curves?I. They are symmetric.II. The curve reaches its peak at the mean.III. 95% percent of the area under the curve is within one standard deviation of themean.
76The Practice of Statistics, 4/e- Chapter 2© 2011 BFW Publishers
© 2011 BFW PublishersThe Practice of Statistics, 4/e- Chapter 277

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