Hi, *For number (1,2,3,4) the choices are: Blinded, Double-Blinded, and Not Blin

Question

Hi,

*For number (1,2,3,4) the choices are: Blinded, Double-Blinded, and Not Blinded.

*For Letters ( b, c and d) the choices are: Statistic, response variable, predictor variable, and Sample. for this one you can't use the choices more than ones

*please only answer if you're sure because it worth a lot of points

*Thank you so much

In each experiment described below, choose whether the experiment is blinded, double blinded, or not blinded. You have one attempt per question 1) In an experiment to test the effectiveness of an anti-depressant medication on clinical depression, an experimenter randomly assigns subjects who have been diagnosed with depression to take either pill A or pill B for three weeks. One of the pills is the anti-depressant; the other pill is a placebo (i.e. not real medication; a sugar pill"). At the end of the three weeks, the experimenter administers a depression inventory questionnaire to all of the subjects. Neither the subjects nor the experimenter are aware of which pill is the medication and which is the placebo This experiment i Blinded Double Blinded 2) In an experiment cts of Red Bull and coffee on alertness, an experimenter randomly assigns a group of volunteers into one of two groups. The Not Blinded people in the first group art yrveITamuan of Red Bull to drink; the people in the second group are given a cup of coffee to drink. After twenty minutes, the experimenter administers a test of alertness to all of the subjects in both groups, This experiment is: -Selec 3) An experimenter would like to test whether or people can be "primed" to walk slowly using subtle references to old age. She gets a group of volunteers, and one by one administers a test that they believe is a language test, in which each volunteer is asked to construct a sentence from a group of scrambled words. Some of the volunteers are given words like "old geriatric", and "elderly"; others are not. The volunteers are not told the true purpose of the experiment. After each test is administered, the experimenter uses a stopwatch to time how quickly each volunteer walks down the hallway leading out of the building. She suspects that those who have been primed with references to old age will walk more slowly than those who have not. This experiment is ---Select 4) In an experiment to see if my friends prefer my homebrewed beer to a similar style of store-bought beer, I arrange a "tasting" one afternoon in my backyard. Without letting any of my friends see what I'm doing, I go in my kitchen and pour all of my homebrewed beer into red plastic cups and all of the store bought beer into blue plastic cups. I then bring the cups outside and have my friends try one of each and tell me which they like better This experiment is: -Selec x of interest b. The survey respondent's answer to the italicized question above is the statistic c. he survey respondent's gender is the response variable x of interest. d. Suppose we calculate the proportion of voters from our sample who say they are definitely voting. This proportion is an example of a/an predictor variable

Explanation / Answer

1) Doouble blind because neither subjects nor the experimenter are aware of which pill is the medication and which is the placebo.

2) Not Blinded because both subjects and the experimenter are aware of whichdrink they are given.

3) Blinded because only subjects were not told the true purpose of the experiment.

4) Blinded because only subjects were not told which drink they are getting.

a) Response variable

b) Predictor variable

c) Statistic

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