Question

A researcher tests the hypothesis that large, daily doses of vitamin C help protect against catching the common cold. What would be the best experimental and control group to test this hypothesis?

a) Experimental group: takes a large dose of vitamin C daily; Control group: takes nothing
b) Experimental group: people with a cold are administered vitamin C daily; Control group: people without a cold are not administered vitamin C
c) Experimental group: takes a large dose of vitamin C daily; Control group: takes a large weekly dose of vitamin C.
d) Experimental group: takes a large, daily dose of vitamin C; Control group: takes a daily dose of a sugar pill disguised as vitamin C

Answer 1

The best experimental group takes a large, daily dose of vitamin C, while the control group takes a daily dose of a sugar pill disguised as vitamin C.

Step-by-step explanation:

The best experimental and control group to test the hypothesis that large, daily doses of vitamin C help protect against catching the common cold would be:

1. Experimental group: takes a large, daily dose of vitamin C
2. Control group: takes a daily dose of a sugar pill disguised as vitamin C

This design allows for a comparison between the group taking the vitamin C and the group not taking it, providing a clear distinction between the experimental and control conditions.