I HAVE UPLOADED 3 QUESTIONS ALONG WITH 3 EXAMPLES. PLEASE WRITE OUT THE ANSWER AND UPLOAD INSTEAD OF TYPING.

CHAPTER 9 - Inferences from Two Samples

9-1 Two Proportions 9-2 Two Means: Independent Samples 9-3 Two Dependent Samples (Matched Pairs) 9-4 Two Variances or Standard Deviations

Five students took a math test before and after tutoring. Their scores were as followed: Subject A B C D E Before 71 66 75 78 66 After 75 75 73 81 78 Use a 0.01 level of significance to test the claim that the tutoring has an effect on increasing the math scores. (Make sure you have the four steps shown simil- to the examples that I gave) Assume that two dependent samples have been randomly selected from normally distributed populations. Instruction: 1) Must contains 4 steps as shown on the instructor's video. 2) Must identify whether the null hypothesis or the alternative hypothesis is the claim. 3) When doing the calculation, do not calculate standard error. O FiA marketing survey involves product recognition in New York and California. Of 558 New Yorkers surveyed, 193 knew the product while 196 out of 614 Californians knew the product. At the 0.05 significance level, test the claim that the recognition rates are the same in both states. (Make sure you have the four steps shown similar to the examples that I gave) Instruction: 1) Must contains 4 steps as shown on the instructor's video. 2) Must identify whether the null hypothesis or the alternative hypothesis is the claim. 3) When doing the calculation, do not calculate standard error. 4) When finding the p-value, must show whether it is left-, right-, or two-tailed. 5) When drawing conclusion, must follow the wording from the textbook. O Eli DELLstructure.com/courses/23949/quizzes/160770/take Students in two elementary school classrooms were given two versions of the same test, but with the order of the questions arranged from easier to more difficult in version A and in reverse order in version B. Randomly selected students from each class were given version A and the rest given version B. The results are Version A : n1 = 31, 21 = 83, $1 - 4.6 Version B : n2 = 32, 12 = 78, $2 Use a 0.01 significance level to test the claim that Version A is easier than version B. (Make sure you have the four steps shown similar to the examples that I gave) Assume that the two independent samples have been randomly selected from normally distributed populations. Instruction: 1) Must contains 4 steps as shown on the instructor's video. 2) Must identify whether the null hypothesis or the alternative hypothesis is the claim. 3) When doing the calculation, do not calculate standard error. 4) When finding the p-value, must show whether it is left-, O DELL