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5. What is ANOVA's test statistic (i.e., what does an ANOVA compute/ what do you look...

5. What is ANOVA's test statistic (i.e., what does an ANOVA compute/ what do you look up on an ANOVA results table)?

6. I want to examine whether people with higher education vote more, on average. What stat should I use? . A. Independent samples t-test B. Regression C. Correlation D. One Sample T-Test

7. You are working at a research hospital, helping with an experimental study on antiretroviral medications. Participants have been randomly assigned to take either AZT, Stribild, Complera, or a brand-new medication. The doctor who is leading the study shows you a correlation table and is excited, because type of drug is strongly correlated with number of HIV antibodies. What did the doctor do wrong? Explain in detail

8. Which of the following statistical tests can be appropriate for controlled experiments on small samples? Assume the IV is manipulated, but could be either continuous OR categorical. A. Independent samples t-test B. Z-test C. ANOVA D. Regression

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Answer #1

5) ANOVA 'S test statistic is F . It calculates F value. By using formula

F= Mean sum of squares between groups/ Mean sum of squares within groups

6) This is correlation test. Here we have to examine  whether people with higher education vote more, on average..

So Correlation Test.OPTION C

7) Doctor here did correlation test instead of paired test. Here doctor is finding correlation between type of drug is and number of HIV antibodies which is not required here. Here we need to compare mean effect of treatments on patients.

8) For this case Independent samples t test is appropriate. OPTION A

Can not use Ztsest because it is use when population Standard deviation is known or sample is large. ANOVA FOR TWO OR MORE SAMPLES. AND REGRESSION IS FOR FINDING RELATIONSHIP BETWEEN INDEPENDENT VARIABLES AND DEPENDENT VARIABLES.

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