08306 A I 1 Search Q Fail to reject H0 and fail to support H1 I (claim) 0 Reject H0 and support H1 (claim) O Fail to reject H0 (claim) and support H1 (e) Select the correct conclusion. 0 We prove that the scores before and after publication are equivalent. O At a 2% level of significance, there is not sufficient sample evidence to support the claim that the scores, on average, become lower after publication. 0 At a 2% level of significance, the sample data support the claim that the scores, on average, become lower after publication. O The scores become significantly higher after publication. Question Help: 8 Message instructor Add Work Next Question H ideas.humber.ca 08:06 a g 1 Search (c) What is the test statistic? I You do not need to enter the sign of the test statistic in the separate box. Put minus sign if the value is negative and put no sign if the value is positive. Round your answers to 2 decimal places. tst (d) Is the null hypothesis rejected? Is the alternative hypothesis supported? O Reject H0 (claim) and fail to support H1 0 Fail to reject H0 and fail to support H1 (claim) 0 Reject H0 and support H1 (claim) O Fail to reject H0 (claim) and support H1 (e) Select the correct conclusion. 0 We prove that the scores before and after publication are equivalent. O At a 2% level of significance, there is not sufficient sample evidence to support the claim that the scores, on average, become 8 ideas.humber.ca 08306 A I 1 Search H1: Select an answer 0 7 C I Which one is the claim? 0H0 0H1 (b) Identify the test type and find the critical value(s). The test is Select an answer 0 Please select the correct sign for the critical value(s) and keep 3 decimal places in your answer. Critical value (3) = 7 c (c) What is the test statistic? You do not need to enter the sign of the test statistic in the separate box. Put minus sign if the value is negative and put no sign if the value is positive. Round your answers to 2 decimal places. tst B ideas.humber.ca 08:06 Q I 1 Search approximately bellshaped distribution. I Part I. Suppose that differences are d : Before After. Find the sample mean d and sample standard deviation 3d of the differences. Step 1. Fill in the column "d 2 Before After " of the table. Then, calculate d and fill in the cell below the table. Step 2. Using d , fill in the last two columns of PI- IT (D FF 9) g (D d 9.. | 51' | Participant Before After Total 777777 Wi 777777l 777777/cl 777777 E ideas.humber.ca 08:06 30 Search ely bell-shaped distribution. pose that differences are d = fter . Find the sample mean d and idard deviation sa of the differences. n the column "d = Before - After " Then, calculate d and fill in the cell able. ng d , fill in the last two columns of 2 Before After d d - d d - d 4 3 9 6 7 5 6 4 2 0 ideas.humber.ca08306 A I 1 Search IU'CII I I I I I Sample mean of the differences is d 2 Please, round your answer to 2 decimal places. Standard deviation of the differences is ad : Part II. At a 2% significance level test the claim that the publications of Derma#1 clinic's report reduced, on average, the willingness to use NoHe/ios lotion. Hint: Use the Student tdistribution test for matched pairs and the following formula d Md (i) a (a) State the null and alternative hypotheses, and identify which one is the claim. tst H0: Select an answer 0 ? 0 H1: Select an answer 0 7 0 Which one is the claim? 8 ideas.humber.ca 08:06 30 Search . Question 5 50 pts 9 1 0 Details Recently, the Derma#1 research clinic published a report stating that the regular application of a very popular sunscreen lotion NoHelios might cause some forms of skin cancer. The manufacturer of NoHelios issued an energetic counterstatement asserting that the Derma#1 clinic's conclusions were statistically inconsistent. Wellbeing pharmacy chain has been selling NoHelios lotion for a long time. The market research department of Wellbeing wants to see what is currently happening with NoHelios lotion demand. The members of a random sample of customers were asked about their willingness to use NoHelios before and after the publication of Derma#1 clinic's report. The answers were provided in form of a score from 0 to 10 (higher score means more willingness). Results for five customers are shown in the following table. The "before" score is matched to the "after" score, and the difference should be calculated. Suppose that it is known that such differences have approximately bell-shaped distribution. AA ideas.humber.ca C