An experiment was conducted to help determine if giving caffeine to rats affecte
ID: 3433961 • Letter: A
Question
An experiment was conducted to help determine if giving caffeine to rats affected their sleep. The three treatments were a control, a low caffeine dose of 1 mg/ml of blood, a medium dose of 3 mg/ml of blood, and a higher caffeine dose of 5 mg/ml of blood. Twelve rats were assigned at random to the four treatments, three to each treatment, and the minutes of sleep measured over a 24-hour period was recorded. The data follow.
Treatment
Minutes of sleep
Control
450 413 418
Low dose
466 422 435
Medium dose
421 453 419
High dose
364 330 389
The sum of squares for error is
4,310.
11,976.
16,286.
43,855.
Treatment
Minutes of sleep
An experiment was conducted to help determine if giving caffeine to rats affected their sleep. The three treatments were a control, a low caffeine dose of 1 mg/ml of blood, a medium dose of 3 mg/ml of blood, and a higher caffeine dose of 5 mg/ml of blood. Twelve rats were assigned at random to the four treatments, three to each treatment, and the minutes of sleep measured over a 24-hour period was recorded. The data follow. Assume the data are three independent SRSs, one from each of the four populations of caffeine levels, and that the distribution of the yields is Normal. A partial ANOVA table produced by Minitab follows, along with the means and standard deviation of the yields for the four groups. One-way ANOVA: Rest versus CaffeineExplanation / Answer
Answer: 4,310
Mean n Std. Dev 427.0 3 20.07 Control 441.0 3 22.61 Low dose 431.0 3 19.08 Medium dose 361.0 3 29.61 High dose 415.0 12 38.48 TotalRelated Questions
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