Question

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 90​% confident that your sample mean is within 14 minutes of the population​ mean? Assume that the standard deviation of the population of monthly time spent on the internet is 198 min. The minimum sample size required is_______computer users.

Many states are carefully considering steps that would help them collect sales taxes on items purchased through the Internet. How many randomly selected sales transactions must be surveyed to determine the percentage that transpired over the Internet? Assume that we want to be 99% confident that the sample percentage is within seven percentage points of the true population percentage for all sales transactions.

A programmer plans to develop a new software system. In planning for the operating system that he will​ use, he needs to estimate the percentage of computers that use a new operating system. How many computers must be surveyed in order to be 99% confident that his estimate is in error by no more than four percentage points question marks? Assume that nothing is known about the percentage of computers with new operating systems.

Many states are carefully considering steps that would help them collect sales taxes on items purchased through the Internet. How many randomly selected sales transactions must be surveyed to determine the percentage that transpired over the Internet? Assume that we want to be 95% confident that the sample percentage is within eoght percentage points of the true population percentage for all sales transactions.

Find the sample​ size, n, needed to estimate the percentage of adults who have consulted fortune tellers. Use a 0.04 margin of​ error, use a confidence level of 95​% and use results from a prior poll suggesting that 16​% of adults have consulted fortune tellers.

Find the sample​ size, n, needed to estimate the percentage of adults who have consulted fortune tellers. Use a 0.08 margin of​ error, use a confidence level of 90​% and use results from a prior poll suggesting that 11​% of adults have consulted fortune tellers.

Answer 1

Only one question solved. Please put one question in each post, it helps to give details solutions

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 90​% confident that your sample mean is within 14 minutes of the population​ mean? Assume that the standard deviation of the population of monthly time spent on the internet is 198 min. The minimum sample size required is_______computer users.