IP Take a Test ALYSSA GO x c Chegg Tutors l Online Tuto x e

IP Take a Test ALYSSA GO x c Chegg Tutors l Online Tuto x e How to Calculate Standar C e https:// 18 chapter 8&sectionId; 38 objectiveld 48 studyPlanAssignment 4873678 viewMode 08 back httAR A E www.mathxl.com MyMathLab Help ALYSSA ICH 12/21/15 1:12 PM Quiz Me: Quiz Me: 7.3-4 Find the required sample sizes to estimate the population mean. Submit Quiz This Question 1 pt 2 of 2 This Quiz 2 pts possible E Question Help HCH In order to estimate the mean amount of time computer users spend on the internet each month, how many computer users must be surveyed in order to be 95% confident that your sample mean is within 14 minutes of the major obstacle to getting a population mean? Assume that the standard deviation of the population of monthly time spent on the internet is 203 min What is a good estimate of the population mean? Use technology to find the estimated minimum required sample size The minimum sample size required is computer users. (Round up to the nearest whole number.) What is a major obstacle to getting a good estimate o he population mean? O A. There may not be 808 computer users to survey O B. It is difficult to precisely measure the amount of time spent on the internet, invalidating some data values O C. The data does not provide infor rmation on what the computer users did w hile on the internet C D. There are no obstacles to getting a good esitmate of the population mean Click to select your answer(s) Save for Later Next Question 1:12 PM 12/21/2015

Solution

E = margin of error = 14

Alpha = 0.05

sd = 203

Sample size = Z0.025^2 * sd^2 / E^2

= 1.96^2 * 203^2/14^2

= 807.69 ~ 808

22.) B