27. Call me: A sociologist wants to construct a 95% confidence interval for the proportion of children aged 8-12 living in New York who own a cell phone. a. A survey by the National Consumers League estimated the nationwide proportion to be 0.56. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.02? b.Estimate the sample size needed if no estimate of p is available.

27. Call me: A sociologist wants to construct a 95% confidence interval for the proportion of children aged 8-12 living in New York who own a cell phone. a. A survey by the National Consumers League estimated the nationwide proportion to be 0.56. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.02? b.Estimate the sample size needed if no estimate of p is available.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter4: Equations Of Linear Functions

Section: Chapter Questions

Problem 8SGR

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