In ANOVA the formula for the sum of squares total is: O Eu-VP O En,(x - RY In, -1)5 OE[ ( x, - x, ) 7-1 701 Question 4 (1 point) What is Do ? The average difference score in the population The average difference score in the sample The hypothesized difference between two populations means in the context of two matched samples The hypothesized difference between two populations means in the context of two independent samples Question 5 (1 point) Prison Home x 16 F2 S % & 5 7 3 4 E R T Y U D F G H K C V B N MQuestion 7 (1 point) A simple random sample of size 1000 gives a sample proportion p .30. What is the margin of error here at the 99% confidence level? O.0374 O.3374 O.0748 O 2.58 Question 8 (1 point) An instructor has developed two forms of a final exam. Each student was given one or the other form at random. The instructor is interested in testing the hypothesis that both forms of the final exam were of the same level of difficulty. What statistical procedure should this instructor use to test his or her hypothesis? A Z-test for the difference between two population means for independent samples A t-test for the difference between two population means for independent samples An F-test for the significance of variance accounted for by the regression equation A t-test for the difference between two population means for matched samples dx Prison Home SS 3 4 5 8 W E R T Y U D F G H K X C V B N MQuestion 5 (1 point) In the context of simple linear regression, the regression line is fitted based on least squares. Which squared values are minimized in fitting the regression line? OE ( x i - * ) 2 OE( Vi - Di )2 O E ( Vi - y ) 2 Question 6 (1 point) An instructor is interested in finding out whether there is a relation between the number of hours spent in preparation for a final exam and the grade on the final exam. In testing the hypothesis that there is a significant relation between the number of hours spent in preparation for a final exam and the grade on the final exam, what statistical procedure should this instructor use? At-test for the difference between two population means for independent samples At-test for the difference between two population means for matched samples An F-test for the significance of By A z-test for the difference between two population means for independent samples DIL Prison Home 12 ET S 3 4 5 6 7 8 E R T Y U D F G H L C V B N Mquestion 1 (1 point) In a given data set, the coefficient of correlation between variable x and variable y is .6, with variable x being the independent variable and variable y being the dependent variable. What percentage of variation in the dependent variable is explained by the variation in the independent variable? 66% 36% 77.46% O 24% Question 2 (1 point) What is ? It is an estimate of the standard deviation of difference scores It is an estimate of the standard error for the difference between two means It is an estimate of the standard error of difference scores It is an estimate of the standard error of the mean Question 3 (1 point) Saved In ANOVA the formula for the sum of squares total is: Prisch Home End 140 S 3 4 W E R T Y U O S D F G H K X C V B N M
