Estimating a Population Proportion Answers

According to a recent random survey of 3,728 US adults, 1,939 report using their cell phones to play online games. Construct and interpret a 95% confidence interval for the proportion of US adults who use their cell phones to play online games. State: confidence interval for the true proportion of US adults who use their cell phones to play online games. Plan: ; Random: Random survey; 10%: 3,728 is less than 10% of all US adults; Large Counts: 1,939 successes and 1,789 failures ≥ 10. Do: Conclude: We are 95% confident that the interval from includes the true proportion of all US adults to play online games.

✔ one-sample z-interval for ptwo-sample z-interval for pone-sample t-interval for mutwo-sample t-interval for mu

(0.464, 0.496)(0.499, 0.541)✔ (0.504, 0.536)(0.519, 0.520)

(0.464, 0.496)(0.499, 0.541)✔ (0.504, 0.536)(0.519, 0.520)

✔ who use their cell phoneswho used their cell phoneswho did use their cell phoneswho would have used their cell phones