Question: Two sun blockers are to b e compared. One blocker is rubbed on one side of a subject's back and the other blocker is rubbed

Two sun blockers are to b e compared. One blocker is rubbed on one side of a subject's back and the other blocker is rubbed on the other side. Each subject then lies in the sun for two hours. After waiting an additional hour, each side is rated according to redness.

Subject No. 12345 Blocker 1 6 65749 Blocker 2 4 5327

(a) Evaluate the t statistic

(b) How many degrees of freedom does this t have?
(c) Use software to confirm your value oft.

Subject No. 12345 Blocker 1 6 65749 Blocker 2 4 5327

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