Question

volunteers who had developed a cold within the previous 24 hours were randomized to take either zinc or placebo lozenge every 2 o 3 hour symptoms were gone. 24 participants look zinc lozenges, and 23 participants took placebo lozenge. The mean overall duration of symptoms was found for each group. We want test to see if the zinc lozenges improved recovery times using a=0.10

b) Ho and Ha, in symbols and words

c) what conditions must be met for the sample statistic to approximately normal.

d) is this a paired or indepensnt t test? (explain)

e) value for test statistic

f ) p-value

g) conclusion of the hypothesis

Zinc: mean=15.501 SD=3.011

Placebo: mean=17.45 SD=2.955

Answer 1