Question

) Ul the residuals and achieve a Une &f the above. In a recent study, blood samples were taken on 20 participants before and after one week of drinking about five cups of tea a day. The before and after samples for each participant were exposed to E.coli bacteria, and the production of interferon gamma (a molecule that fights bacteria, viruses and tumors) was recorded for the before and after samples for each participant. The researcher would like to know whether drinking tea helps to build a stronger immune system (increases the production of interferon gamma). Which of the following procedure should be used to analyze the data and answer the research question? A. One-sample T procedure B. Paired T procedure C. Two-sample T procedure D. ANOVA E. Simple Linear Regression In order to perform the procedure selected, which of the following is true? We need to perform a Shapiro-Wilk test of normality on the before and after samples of the production of interferon gamma and achieve a p-value of at least 0.05. A. B. We need to perform a Shapiro-Wilk test of normality on the before and after samples of the production of interferon gamma and achieve a p-value less than 0.05 We need to perform a Shapiro-Wilk test of normality on the differences in C. production of interferon gamma between before and after samples and achieve a value of at least 0.05 5

Answer 1

(oe Sampe a specigc mea e ere se meed an (s a smire UU ay nence

oeen bots condklions ) di peopde in condtio e to deleomine whether thee coe ant dny stai sticadifernbehuesn pouph must be thesne afles tatina lea. test can be use」

eed to on the Prse achieve a ae of