14 How does random assignment help control for the effeets of outside or extrane

Question

14 How does random assignment help control for the effeets of outside or extraneous variables on the a. It includes the outside variables in the stuady by messuring them c. The outside d. All of the above. eliminates outside variables, arnables cancel each other out by existing equally in both groups shudied. 35. When do you know if your finding is statistically significant? a. When the beta coefficient is big c. d. When the p value is big When the p value is small. 36. What is the ideal p level I when you are testing your hypotheses? a. Below or equal to 5 b. Below or equal to.05 c. Below or equal to 5 d. Above or equal to.005 37. What does your R squared (or F score) tell you? How significant your key independent variable is. a. How much variance in your dependent variable is explained by all your variables taken together. c. Whether or not your hypothesis is supported. d. How much variance your independent variable explains b. 38. What is a Type I error in testing hypothesis? Not checking for multicollinearity Saying your hypothesis was not significant, when it really is. Saying your hypothesis is significant when it really is not. When you don't have a falsifiable hypothesis. a. b. 39. If we were to test the relationship between hours studying and GPA, we would expect to find a. A positive correlation. b. A negative correlation. c. We couldn't test using a regression, we would need to use the ANOVA d. We couldn't test using a regression, we would need to compare means. 40. What does a strong correlation between x and y tell us? a. It tells us that x causes y b. It tells us that as x goes up, y goes down. It tells us that as x goes up, y goes up. c. d. It tells us that x and y move together What hurts the process of seeking out faculty among college students, according to Chang's rese a.Parents income b. Students' major c. Student goes to college because their parents demand it. d. When students' study alone.

Explanation / Answer

34-Option(a)-Random assignment incorporates extraneous variables into the study as control conditions so that each participant has equal chance of getting subjected to a condition.

35-Option(d)

36-Option(b)

P-value indicates the closeness of our sample data to support our Null hypothesis.Smaller the p-value,it is less likely that the null hypothesis is true and our finding is statistically significant

37-Option(b)

The R square gives us the percentage of variation in the dependent variable explained by the independent variables taken together in the model.

39- Option(a) More Hours studied have a strong relationship with good GPA.So the correlation should be positive.

40-Option(d) Strong correlation between x and y indicate strong linear relationship between them which means they move together.

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