The Federal Drug Administration wishes to determine whether theclaims that Vitamin C prevents colds has any truth. In a clinicaldrug trial, 30 subjects were randomly assigned to either theVitamin C group (receiving a daily supplement of the minimum dailyrequirement) or the placebo group (who received no supplement butdid get a placebo pill). The number of self- reported colds isrecorded after three years. Number of colds in 3 years: Vitamin Cgroup: 3, 8, 6, 7, 4, 9, 2, 5, 7, 11, 10, 8, 7, 6, 7 Placebo group:8, 8, 7, 10, 11, 4, 3, 7, 6, 8, 4, 10, 6, 8,5 The value of thenumerator (either + or -) in the t test formula for Problem 3 is_____. Then what is the degrees of freedom and what is the derivedt value ? Also, what can be concluded from the statistical analysisand what significance level should be reported?
(I want to compare my answers to yours, because I have differentanswers than what was given to me earlier on this site, and I don;tunderstand why...thank you.)
