Question: 4. Is diet or exercise effective in combating insomnia ? Some believe that cutting our desserts can help alleviate the problem, while others recommend exercise.

4. Is diet or exercise effective in combating

4. Is diet or exercise effective in combating insomnia ? Some believe that cutting our desserts can help alleviate the problem, while others recommend exercise. Forty volunteers suffering from insomnia agreed to participate in a month-long test. Half were randomly assigned to a special no-desserts diet ; the others continued desserts as usual. Half of the people in each of these groups were randomly assigned to an exercise program, while the others did not exercise. Those who ate no desserts and engaged in exercise showed the most improvement. Identify (if possible) : (a) the factor(s) in the experiment and the number of levels for each. (b) the number of treatments. (c) the experimental units. (d) the blocks. (e) the design of the experiment

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