Question

A researcher wishes to estimate, with 95% confidence and within 2%, the proportion of people who did not have a land line phone. A previous study shows that 40% of those interviewed did not have a land line phone. How large a sample is necessary to estimate the true proportion?

Name: a researcher wishes to estimate with 95 confidence and within 2 the proportion of people who did not have a land line phone a previous study shows that 40 of those interviewed did not have a 56478
Uploaded: 2022-03-15T17:40:01-08:00
Duration: 2 min 59 s
Channel: Babar Ali
Description: a researcher wishes to estimate with 95 confidence and within 2 the proportion of people who did not have a land line phone a previous study shows that 40 of those interviewed did not have a 56478

          A researcher wishes to estimate, with 95% confidence and within
2%, the proportion of people who did not have a land line
phone.  A previous study shows that 40% of those interviewed
did not have a land line phone. How large a sample is necessary to
estimate the true proportion?

Added by Dawn M.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert Babar Ali

03/15/2022

Step 1

Step 1: Identify the given values in the question: - Confidence level: 95% - Margin of error: 2% - Previous study proportion: 40% Show more…

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A researcher wishes to estimate, with 95% confidence and within 2%, the proportion of people who did not have a land line phone. A previous study shows that 40% of those interviewed did not have a land line phone. How large a sample is necessary to estimate the true proportion?