Chapter 6: Q 53 (page 387)
Find the percentile.
Short Answer
The value of the Percentile is 50.0264
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Chapter 6: Q 53 (page 387)
Find the percentile.
The value of the Percentile is 50.0264
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About what percent of values lie between the first and second standard deviations from the mean (both sides)?
Suppose X ~ N(–1, 2). What is the z-score of x = 2.
Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed with a mean of 250 feet and a standard deviation of 50 feet.
a. If X = distance in feet for a fly ball, then X ~ _____(_____,_____)
b. If one fly ball is randomly chosen from this distribution, what is the probability that this ball traveled fewer than 220 feet? Sketch the graph. Scale the horizontal axis X. Shade the region corresponding to the probability. Find the probability.
c. Find the 80th percentile of the distribution of fly balls. Sketch the graph, and write the probability statement.
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 randomly selected golfer scored less than .
Suppose . What value of is two standard deviations to the right of the mean?
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