Answer Happy

_1) In hypothesis testing, you can draw different conclusions based on the results of your test. If your obtained statistic were larger than your critical statistic, what can you conclude? a. The null hypothesis is right. You accept the null. b. The observations are wrong. The null is likely. C. The observed outcome would be rare assuming the null were true. d. The observed outcome would be common assuming the null were true. 2) You want to test whether childhood background affects academic performance. To conduct your study, you have three groups of participants: people coming from single-parent households, those who grew up with their biological parents, and those who grew up with a step-parent. You test whether average grades and scores differ between the three groups. Wha test would you use? a. Regression. b. Independent Sample T-test. c. Analysis of Variance. d. Correlation. 3) Which of the following measures provides information about the magnitude of an effect? a. X2 b. P-value C. T-test d. Correlation 4) Imagine you want to test whether there are cultural differences in aggression. You will compare aggression scores of individuals from 2 very different countries. To get accurate measurements of aggression, you want to minimize error. Which of the following would minimize the error you observe? a. Very small means. b. Very small standard deviations. C. Very large standard deviations. d. Very large means.

5) How is a regression analysis different from an ANOVA? a. A regression analysis can have more than two independent variables, whereas an ANOVA cannot. b. A regression analysis has interval-level dependent variable, whereas an ANOVA has nominal-level dependent variable. A regression analysis has interval-level independent variable, whereas an ANOVA has nominal-level independent variable. d. All of the above are correct, 6) Imagine you conduct an Independent Samples T-test. Which of the following statistics would reveal how big the differences between the groups are? a. p-value. 5. The size of your obtained t. Cohen's d d. n. 7) Let's say I was interested in how the IQ scores of IUPUC students compared to the rest of Indiana. I know that the population mean and standard deviation in Indiana is = 100, 0 =15 I get a sample of 200 IUPUC students and compare their scores to the population average. What statistical test should I perform? Z-test 6. Independent Samples t-test c Correlation d. ANOVA 8) You want to investigate whether studying for a statistics final pays off with higher Brades. To conduct this study, you ask all your classmates how many minutes they studied and then ask them what their score was on the exam. How would you analyze this data? Z-test b. Independent Samples T-test CANOVA d. Regression a. a 9) What type of variables do you need to perform a xanalysis? Nominal IV: Interval DV b. Interval IV; Nominal DV Nominal IV; Nominal DV d. Interval IV; Interval DV 10) How are significance tests and measures of effect size related? a. They are positively related such that statistical significance yields large effect sizes and statistical nonsignificance yields small effect sites. b. They are inversely related such that statistical significance yields small effect sizes and statistical nonsignificance yields big effect sizes. c. They are unrelated. d. They provide the same, redundant information