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Another study was done with smokers to determine success rates of quitting. Of 567 smokers that...

  1. Another study was done with smokers to determine success rates of quitting. Of 567 smokers that smoked for 10+ years and used gum to quit, 321 of them were still not smoking after 1 year. Of 631 smokers that smoked for 10+ years and used the patch to quit, 457 of them were still not smoking after 1 year. Calculate a 95% +4 confidence interval with your calculator to estimate the true difference proportion of smokers that successfully quit for a year using nicotine gum or patch.
    Let  be the group that used the patch to quit, and Let  be the group that used gum.

    (round your interval to the nearest 100th of a percent)

    I am % confident that long term smokers that use  (the patch/gum) are  (more/less) successful at quitting for more then a year then smokers that use  {the patch/gum) between  and  of the time.

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