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Chapter 6: Q 18 (page 385)
Suppose X ~ N(2, 3). What value of x has a z-score of 鈥�0.67?
The value of x is
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Use the following information to answer the next four exercises:
Find the probability that
The golf scores for a school team were normally distributed with a mean of and a standard deviation of three.
Find the probability that a golfer scored between and
Suppose . What value of is standard deviations to the left of the mean?
Suppose that Ricardo and Anita attend different colleges. Ricardo's GPA is the same as the average GPA at his school. Anita's GPA is standard deviations above her school average. In complete sentences, explain why each of the following statements may be false.
a. Ricardo's actual GPA is lower than Anita's actual GPA.
b. Ricardo is not passing because his -score is zero.
c. Anita is in the percentile of students at her college.
The length of time to find it takes to find a parking space at 9 A.M. follows a normal distribution with a mean of five minutes and a standard deviation of two minutes. If the mean is significantly greater than the standard deviation, which of the following statements is true?
I. The data cannot follow the uniform distribution.
II. The data cannot follow the exponential distribution..
III. The data cannot follow the normal distribution.
a. I only
b. II only
c. III only
d. I, II, and III
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