Question: A researcher would like to examine the effects of humidity on eating behavior. It is known that laboratory rats normally eat an average of \(\mu \) = 21 grams of food each day. The researcher selects a random sample of n = 100 rats and places them in a controlled atom sphere room where the relative humidity is maintained at 90%. The daily food consumption for the sample averages M =18.7 with SS = 2475.

1. Can the researcher conclude that humidity has a significant effect on eating behavior? Use a two-tailed test with a = .05.
2. Compute the estimated d and to measure the size of the treatment effect.

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