Researchers from PETA and NIH collaborated on a study to examine the effect, on rats, of being reared in laboratory settings. Sets of 3 rats from 8 litters were randomly assigned to three conditions: (1) Being reared in a standard laboratory setting, (2) Being reared in an enriched laboratory setting, and (3) Being reared in a setting that mimics the wild (e.g., the rats have to forage for their own food; food is occasionally sparse and of poor quality). When the rats reached adulthood, they were given a series of behavioral tasks from which their rat IQ (RIQ) scores were calculated. RIQ scores are interval-level and are scored like human IQ scores. The three means were 95.00 (normal lab), 108.00 (enriched lab), and 94.00 (mimicked wild). No nonrobust assumptions were violated and a one-way, repeated-measures ANOVA was completed with α = .05. The results are shown below. F_cvwas 3.739, η²was calculated as 37.14%, and HSD was found to be 9.32. Write a four-point interpretation.

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Sum of Degrees of Mean Source of Variability Squares Freedom Square ratio 941.33 Subjects Treatment Residual Total 2 14 488.00 9.61 50.76 976.00 710.67 2,628.00 23