A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What size sample should be obtained if she wishes the estimate to be within 0.03 with 95% confidence if (a) she uses a previous estimate of 0.54? (b) she does not use any prior estimates?

A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What size sample should be obtained if she wishes the estimate to be within 0.03 with 95% confidence if (a) she uses a previous estimate of 0.54? (b) she does not use any prior estimates?

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

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.6: Summarizing Categorical Data

Problem 31PPS

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Question

A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What size sample should be obtained if she wishes the estimate to be within

0.03

with

95%

confidence if

(a) she uses a previous estimate of

0.54?

(b) she does not use any prior estimates?

Question content area bottom

Part 1

(a)

n=enter your response here

(Round up to the nearest integer.)

(Ro
Table of critical values
Level of Confidence,
(1 − α)∙100%
95%
Area in Each Tail,
Print
0.05
0.025
(X
2
Done
Critical Value, zę
1.645
1.96
2.575
- X

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