In a survey conducted by CNN, 130 of the 250 people that were randomly surveyed have a savings account. (a) Construct a 90% confidence interval to estimate the true population proportion of people that have a savings account. (b) Suppose CNN is going to conduct this survey a second time. If we want our estimate to be within 3% of the true population proportion with 90% confidence, how many people do we need to sample?

In a survey conducted by CNN, 130 of the 250 people that were randomly surveyed have a savings account. (a) Construct a 90% confidence interval to estimate the true population proportion of people that have a savings account. (b) Suppose CNN is going to conduct this survey a second time. If we want our estimate to be within 3% of the true population proportion with 90% confidence, how many people do we need to sample?

College Algebra (MindTap Course List)

12th Edition

ISBN:9781305652231

Author:R. David Gustafson, Jeff Hughes

Publisher:R. David Gustafson, Jeff Hughes

Chapter8: Sequences, Series, And Probability

Section8.7: Probability

Problem 58E: What is meant by the sample space of an experiment?

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