symptoms after the virus} show a reduction in symptoms after vaccination. | recruited 1000 patients who have received the vaccine and 1000 patients who did not receive the vaccine and ask them to rate their improvement in symptoms from their diagnosis to today {scale 1-10, where 10 is a big improvement}. The shapiro-wilk test for normality had a p-value of 0.12 for the vaccinated patients and 0.33 for the non-vaccinated patients. Which two sample test should I use? I can't tell from the information you have given me two sample t-test (unequal variance) two sample t-test (equal variance) Mann Whitney Wilcoxon Signed Rank paired t-testA second lab is interested in replicating my research on COVID patients. They recruited and measured symptom improvement in the same way, from the same number and type of patients {same experimental design). Their shapirowilk test for normality had a pvalue of 0.04 for the vaccinated patients and 0.13 for the non-vaccinated patients. Which two sample test should they use? 0 two sample t-test (equal variances) O I can't tell from the information you have given me 0 Mann Whitney O Paired ttest 0 two sample t-test (unequal variances} Q Wilcoxon Signed Rank