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In order to gain additional information about respondents, some marketing researchers have used ultraviolet ink to precode questionnaires that promise confidentiality to respondents. Of 262 randomly selected marketing researchers who participated in an actual survey, 154 said that they disapprove of this practice. Suppose that, before the survey was taken, a marketing manager claimed that at least 86 percent of all marketing researchers would disapprove of the practice. (a) Assuming that the manager's claim is correct, calculate the probability that 154 or fewer of 262 randomly selected marketing researchers would disapprove of the practice. Use the normal approximation to the binomial. (Round z value to 2 decimal places. Round your answer to 5 decimal places.) P(x ≤ 154)

In order to gain additional information about respondents, some marketing researchers have used ultraviolet ink to precode questionnaires that promise confidentiality to respondents. Of 262 randomly selected marketing researchers who participated in an actual survey, 154 said that they disapprove of this practice. Suppose that, before the survey was taken, a marketing manager claimed that at least 86 percent of all marketing researchers would disapprove of the practice. (a) Assuming that the manager's claim is correct, calculate the probability that 154 or fewer of 262 randomly selected marketing researchers would disapprove of the practice. Use the normal approximation to the binomial. (Round z value to 2 decimal places. Round your answer to 5 decimal places.) P(x ≤ 154)

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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In order to gain additional information about respondents, some marketing researchers have used ultraviolet ink to precode questionnaires that promise confidentiality to respondents. Of 262 randomly selected marketing researchers who participated in an actual survey, 154 said that they disapprove of this practice. Suppose that, before the survey was taken, a marketing manager claimed that at least 86 percent of all marketing researchers would disapprove of the practice. (a) Assuming that the manager's claim is correct, calculate the probability that 154 or fewer of 262 randomly selected marketing researchers would disapprove of the practice. Use the normal approximation to the binomial. (Round z value to 2 decimal places. Round your answer to 5 decimal places.) P(x ≤ 154)
Transcribed Image Text:In order to gain additional information about respondents, some marketing researchers have used ultraviolet ink to precode questionnaires that promise confidentiality to respondents. Of 262 randomly selected marketing researchers who participated in an actual survey, 154 said that they disapprove of this practice. Suppose that, before the survey was taken, a marketing manager claimed that at least 86 percent of all marketing researchers would disapprove of the practice. (a) Assuming that the manager's claim is correct, calculate the probability that 154 or fewer of 262 randomly selected marketing researchers would disapprove of the practice. Use the normal approximation to the binomial. (Round z value to 2 decimal places. Round your answer to 5 decimal places.) P(x ≤ 154)
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