Cold No Cold Totals Placebo 31 109 140 Vitamin C 17 122 139 Totals 48 231 279When testing the null hypothesis that Vitamin C has no therapeutic value for treating common cold we obtain (choose one):

a) Chi-square = 2.7 , p-value > 10%. Can't reject

b) Chi-square = 4.8 , p-value > 10%. Can't reject

c) Chi-square = 7.8 , p-value < 1%. Reject

d) Chi-square = 3.9 , p-value < 5%. Reject

e) Chi-square = 4.8 , p-value < 5%. Reject