Question 9 (1 point) With 10 degrees of freedom and .01 in the upper tail, what is the critical value of y?? 23.209 2.558 25.188 2.765 Question 10 (1 point) You are hoping to show that the mean of Population 1 is significantly greater than the mean of Population 2. You collect two independent samples, one from Population 1 and the other from Population 2. The correct null hypothesis in this situation is: Ho: Hi- H2 20 O Ho: Hi- H2 = 0 O Ho: Hi- H2 # 0 O Ho: Hi- H2 50 Prisco 3 5 E R T Y U O D F G H K 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 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 17 (1 point) You are testing the null hypothesis that the population mean is equal to 200. What is the rule for rejecting the null hypothesis? When the p-value is s ov/2 When the p-value is 2 w/2 When the p-value is s a When the p-value is z a Question 18 (1 point) Consider the following ANOVA table: Source SS df MS F P-Value Forit Treatments 433 5 86.6 3.5146 0.009989 2.45 Error 985.6 40 24.64 Total 1418.6 45 O.025 O.10 O.01 O.05 Price Home @ 3 5 2 E R T Y U D F G H K C V B N Mime Left:1:23:32 Liam Nandlall: Attempt 1 Question 19 (1 point) When is the : distribution symmetrical? Only when population is normal Always Only when n 2 30 ( Only when up and n(1-p) are both equal or greater than 5 Question 20 (1 point) You want to test for the existence of a predictive relationship between two variables. What would your null hypothesis be? O Ho : p = 0 OH.: a20 O Ho:r= 0 OH. : B , = 0 Question 21 (1 point) Prisco Home A 3 4 5 6 7 E R T Y U D F G H K C V B N M
