A yes b no reynolds phys ed your brain on exercise ny

This preview shows page 20 - 29 out of 35 pages.

(a) Yes(b) NoReynolds, “Phys Ed: Your Brain on Exercise", NY Times, July 7, 2010.
Statistics: Unlocking the Power of DataLock5How to Randomize?Option 1: As with random sampling, we can put all the names/numbers into a hat, and randomly pull out names to go into the different groupsOption 2: Put names/numbers on cards, shuffle, and deal out the cards into as many piles as there are treatmentsOption 3: Use technology
Statistics: Unlocking the Power of DataLock5Knee Surgery for ArthritisResearchers conducted a study on the effectiveness of a knee surgery to cure arthritis. It was randomly determined whether people got the knee surgery. Everyone who underwent the surgery reported feeling less pain. Is this evidence that the surgery causes a decrease in pain?(a) Yes(b) No
Statistics: Unlocking the Power of DataLock5Control GroupWhen determining whether a treatment is effective, it is important to have a comparison group, known as the control groupIt isn’t enough to know that everyone in one group improved, we need to know whether they improved more than they would have improved without the surgeryAll randomized experiments need either a control group, or two different treatments to compare
Statistics: Unlocking the Power of DataLock5Knee Surgery for ArthritisIn the knee surgery study, those in the control group received a fake knee surgery. They were put under and cut open, but the doctor did not actually perform the surgery. All of these patients also reported less pain! In fact, the improvement was indistinguishable between those receiving the real surgery and those receiving the fake surgery!Source: “The Placebo Prescription,” NY Times Magazine, 1/9/00.
Statistics: Unlocking the Power of DataLock5Placebo EffectOften, people will experience the effect they think they should be experiencing, even if they aren’t actually receiving the treatment This is known as the placebo effect
Statistics: Unlocking the Power of DataLock5Study on PlacebosBlue pills are better than yellow pillsRed pills are better than blue pills2 pills are better than 1 pill4 pills are better than 2 pillsAnd shots are the best of all!
Statistics: Unlocking the Power of DataLock5Placebo and BlindingControl groups should be given a placebo, a fake treatment that resembles the active treatment as much as possibleUsing a placebo is only helpful if participants do not know whether they are getting the placebo or the active treatmentIf possible, randomized experiments should be double-blinded: neither the participants or the researchers involved should know which treatment the patients are actually getting
Statistics: Unlocking the Power of DataLock5Green Tea and Prostate CancerA study was conducted on 60 men with PIN lesions, some of which turn into prostate cancerHalf of these men were randomized to take 600 mg of green tea extract daily, while the other half were given a placebo pillThe study was double-blind, neither the

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture