Question

An article investigated the consumption of caffeine among women. A sample of 59 women were asked to monitor their caffeine intake over the course of one day. The mean amount of caffeine consumed in the sample of women was 237.999 mg with a standard deviation of 218.428 mg. In tite article, researchers would like to include a 99% confidence interval. The values below are t critical point corresponding to 90%, 95%, 98%, and 99% confidence, which critical point corresponds to 99% confidence? 2.002 2.663 1.672 2.392 with 99% confidence, we estimate the mean amount of caffeine consumed by women is between mg and mg. (Round the limits of your interval to 4 decimal places.) dence were changed to 98%, what effect would this have on the width of the calculat ed If the level of confi confidence interval? . the interval would widen there would be no effect on the interval the interval would narrow License

Answer 1

Sample sizi 4 0r 2.37,144 21% 428 Han 237.991 t AGG X 21.428

62.2115 313.726s win 16227 It 313.724"-hg- lend changud t x intwal would namau