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 90% confidence if(a) she uses a previous estimate of 0.52?(b) she does not use any prior estimates?Click the icon to view the table of critical values.Table of critical values(a) n=(Round up to the nearest integer.)(b) n =(Round up to the nearest integer.)Critical Value, ZęLevel of Confidence,(1 - a)· 100%Area in Each Tail,90%0.051.64595%0.0251.9699%0,0052.575PrintDone

Plug in all the values in the formula, we get Round the value to the nearest integer.

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 90% confidence if (a) she uses a previous estimate of 0.52? (b) she does not use any prior estimates? E Click the icon to view the table of critical values. Table of critical values (a) n = I (Round up to the nearest integer.) (b) n= (Round up to the nearest integer.) Critical Value, Area in Each Tail, Level of Confidence, (1 - a) - 100% 90% 0.05 1645 95% 0.025 196 99% 0.005 2.575 Print Done

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 90% confidence if (a) she uses a previous estimate of 0.52? (b) she does not use any prior estimates? E Click the icon to view the table of critical values. Table of critical values (a) n = I (Round up to the nearest integer.) (b) n= (Round up to the nearest integer.) Critical Value, Area in Each Tail, Level of Confidence, (1 - a) - 100% 90% 0.05 1645 95% 0.025 196 99% 0.005 2.575 Print Done

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

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section: Chapter Questions

Problem 22SGR

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Concept explainers

Average

In mathematics, everyone must have heard the term average in one place or other. Almost all types of calculation require taking out an average. In everyday life, the term is used for denoting a certain amount that can be said to be a typical quantity for multiple people or objects. In other words, if a group of people possesses a certain object, then the average gives us an idea regarding the quantity of the object possessed by each person. However, this is solely based on mathematical calculation. It is important to note that most people will not strictly have the average value in a group.

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 90% confidence if
(a) she uses a previous estimate of 0.52?
(b) she does not use any prior estimates?
Click the icon to view the table of critical values.
Table of critical values
(a) n=
(Round up to the nearest integer.)
(b) n =
(Round up to the nearest integer.)
Critical Value, Zę
Level of Confidence,
(1 - a)· 100%
Area in Each Tail,
90%
0.05
1.645
95%
0.025
1.96
99%
0,005
2.575
Print
Done

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