6. A tennis player makes a successful first serve 60% of the time. Assume that each serve is independent of the others. If, the player serves 8 times, what is the probability that she gets exactly 3 successful first serves? A. 0.0065 B. 0.216 C. 0.124 D. 1.298 7. A researcher reported that the mean weekly television viewing time for children aged 2-11 years is 24.5 hours with a standard deviation of 6.2 hours. Assuming that the weekly television viewing times are unimodal and symmetric (i.e., approximately bell-shaped), 99.7% of all such children are expected to watch between what range of hours of TV per week? Provide a lower and an upper bound. A. 5.9 and 43.1 B. 18.3 and 30.7 C. 12.1 and 36.9 D. 12.1 and 24.5 8. The diameters of pencils produced by a certain machine are normally distributed with a mean of 0.30 inches and a standard deviation of 0.01 inches. What percent of pencils will have a diameter greater than 0.328 inches. A. 0.9974

6. A tennis player makes a successful first serve 60% of the time. Assume that each serve is independent of the others. If, the player serves 8 times, what is the probability that she gets exactly 3 successful first serves? A. 0.0065 B. 0.216 C. 0.124 D. 1.298 7. A researcher reported that the mean weekly television viewing time for children aged 2-11 years is 24.5 hours with a standard deviation of 6.2 hours. Assuming that the weekly television viewing times are unimodal and symmetric (i.e., approximately bell-shaped), 99.7% of all such children are expected to watch between what range of hours of TV per week? Provide a lower and an upper bound. A. 5.9 and 43.1 B. 18.3 and 30.7 C. 12.1 and 36.9 D. 12.1 and 24.5 8. The diameters of pencils produced by a certain machine are normally distributed with a mean of 0.30 inches and a standard deviation of 0.01 inches. What percent of pencils will have a diameter greater than 0.328 inches. A. 0.9974

College Algebra

10th Edition

ISBN:9781337282291

Author:Ron Larson

Publisher:Ron Larson

Chapter8: Sequences, Series,and Probability

Section8.7: Probability

Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....

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