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Stress and weight in rats. In a study of the effects of stress on weight in...

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Statistics

  1. Stress and weight in rats. In a study of theeffects of stress on weight in rats, 71 rats were randomly assignedto either a stressful environment or a control (nonstressful)environment. After 21 days, the change in weight (in grams) wasdetermined for each rat. The table below summarizes the data onweight gain. Test the claim that stress effects weight. (Use a 10%significance level.)

Group

n

Sample mean

Sample Standard Dev.

Stress

20

26

13.4

No stress

51

32

14.2

Answer & Explanation Solved by verified expert
4.5 Ratings (879 Votes)
GIVENSample size of group Stress 1Sample size of group No Stress 2Sample mean of group Stress 1Sample mean of group No Stress 2Sample standard deviation of groupStress 1 Sample standard deviation of groupNo Stress 2 I have used two    See Answer
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