A researcher wishes to study whether a particular diet is effective in helping people to lose weight. 90 randomly
selected adults were weighed before starting the diet and again after following the diet for one month. 48 people
lost weight, 40 gained weight, and 2 observed no change in their weight. At the 0.01 significance level, test the
claim that the diet is effective.

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The Answer of A researcher wishes to study whether a particular diet is effective in helping people to lose weight. 90 randomly
selected adults were weighed before starting the diet and again after following the diet for one month. 48 people
lost weight, 40 gained weight, and 2 observed no change in their weight. At the 0.01 significance level, test the
claim that the diet is effective.

A Researcher Wishes to Study Whether a Particular Diet Is