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 0.02 with 99% confidenc(a) she uses a previous estimate of 0.42?(b) she does not use any prior estimates?Click the icon to view the table of critical values.(a) n= (Round up to the nearest integer.)(b) n=(Round up to the nearest integer.)Table of critical valuesLevel of Confidence,Area in Each Tail,-2Critical Value, zę(1 – a) 100%90%0.051.64595%0.02519699%0.0052.575PrintDone 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 0.02 with 99% confidence if(a) she uses a previous estimate of 0.42?(b) she does not use any prior estimates?Click the icon to view the table of critical values.(a)(Round up to the nearest integer.)(b) n =(Round up to the nearest integer.)Table of critical valuesLevel of Confidence,Area in Each Tail,Critical Value,(1 – a) - 100%90%0.05164595%0.02519699%0.0052575PrintDoneDYTCOA2334403U 10-8-201MAINTCOA2330401

The given margin of error is 0.02 and confidence level is 99%.

Answered: A researcher wishes to estimate the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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On a scale of 0 to 10, the student rated her enjoyment of stats as an 8. The average rating among students is 5, and the average spread around that mean is 1.5. I got the z score as 2.0. Can you kindly help with these questions below? What percent of college students enjoy statistics more? What percent of college students enjoy statistics less?
A doctor wants to estimate the mean HDL cholesterol of all 20- to 29-year-old females. How many subjects are needed to estimate the mean HDL cholesterol within 3 points with 99% confidence assuming s = 14.7 based on earlier studies? Suppose the doctor would be content with 95% confidence. How does the decrease in confidence affect the sample size required? Click the icon to view a partial table of critical values. subjects. (Round up to the nearest subject.) subjects. (Round up to the nearest subject.) A 99% confidence level requires A 95% confidence level requires How does the decrease in confidence affect the sample size required? O A. Decreasing the confidence level increases the sample size needed. B. The sample size is the same for all levels of confidence. OC. Decreasing the confidence level decreases the sample size needed. ...
you want to obtain a sample to esimate a population proportion. Based on previous evidence, you believe the population standard devition is approximately 65.5. You would like to be 99% confident that your estimate is within 1 of the true population mean. How large of a sample size is required? Do not round mid calculation. Use a critical value rounded to three decimal places.
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