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Statistics / Statistical Techniques in Business and Economics 15 / Chapter 6 / Problem 52

Statistical Techniques in Business and Economics | 15th Edition | ISBN: 9780073401805 | Authors: Douglas Lind, William Marchal, Samuel Wathen

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Dr. Richmond, a psychologist, is studying the daytime television viewing habits of

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QUESTION:

Dr. Richmond, a psychologist, is studying the daytime television viewing habits of college students. She believes 45 percent of college students watch soap operas during the afternoon. To further investigate, she selects a sample of 10. a. Develop a probability distribution for the number of students in the sample who watch soap operas. b. Find the mean and the standard deviation of this distribution. c. What is the probability of finding exactly four watch soap operas? d. What is the probability less than half of the students selected watch soap operas?

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QUESTION:

Dr. Richmond, a psychologist, is studying the daytime television viewing habits of college students. She believes 45 percent of college students watch soap operas during the afternoon. To further investigate, she selects a sample of 10. a. Develop a probability distribution for the number of students in the sample who watch soap operas. b. Find the mean and the standard deviation of this distribution. c. What is the probability of finding exactly four watch soap operas? d. What is the probability less than half of the students selected watch soap operas?

ANSWER:

Step 1 of 5

Probability that a college student watches soap operas or

Sample size of college students

a. Probability distribution of the students who watch soap operas

Let be the number of students who watch soap operas where . Then probability that students watch soap operas is

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