Determining Sample Size . In Exercises 31–38, use the given data to find the minimum sample size required to estimate a population proportion or percentage. 37. Video Games An investor is considering funding of a new video game. She wants to know the worldwide percentage of people who play video games, so a survey is being planned. How many people must be surveyed in order to be 90% confident that the estimated percentage is within three percentage points of the true population percentage? a. Assume that nothing is known about the worldwide percentage of people who play video games. b. Assume that about 16% of people play video games (based on a report by Spil Games). c. Given that the required sample size is relatively small, could you simply survey the people that you know?
Determining Sample Size . In Exercises 31–38, use the given data to find the minimum sample size required to estimate a population proportion or percentage. 37. Video Games An investor is considering funding of a new video game. She wants to know the worldwide percentage of people who play video games, so a survey is being planned. How many people must be surveyed in order to be 90% confident that the estimated percentage is within three percentage points of the true population percentage? a. Assume that nothing is known about the worldwide percentage of people who play video games. b. Assume that about 16% of people play video games (based on a report by Spil Games). c. Given that the required sample size is relatively small, could you simply survey the people that you know?
Solution Summary: The author explains that the confidence level is 90% and E=0.03. If the estimated proportion are not known, the equal proportion is takes for the stackrelp
Determining Sample Size. In Exercises 31–38, use the given data to find the minimum sample size required to estimate a population proportion or percentage.
37. Video Games An investor is considering funding of a new video game. She wants to know the worldwide percentage of people who play video games, so a survey is being planned. How many people must be surveyed in order to be 90% confident that the estimated percentage is within three percentage points of the true population percentage?
a. Assume that nothing is known about the worldwide percentage of people who play video games.
b. Assume that about 16% of people play video games (based on a report by Spil Games).
c. Given that the required sample size is relatively small, could you simply survey the people that you know?
Definition Definition Number of subjects or observations included in a study. A large sample size typically provides more reliable results and better representation of the population. As sample size and width of confidence interval are inversely related, if the sample size is increased, the width of the confidence interval decreases.
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