A study was conducted to explore the effects of ethanol on sleep time. Fifteen rats were...

A study was conducted to explore the effects of ethanol on sleep time. Fifteen rats were randomized to one of three treatments. Treatment 1 got only water (control). Treatment 2 got 1g of ethanol per kg of body weight, and treatment 3 got 2g/kg of ethanol. The amount of REM sleep in a 24hr period was recorded, in minutes. Data are below:

Treatment 1: 63, 54, 69, 50, 72

Treatment 2: 45, 60, 40, 56

Treatment 3: 31, 40, 45, 25, 23, 28

a) Create 95% CIs for all pairwise comparisons of means using the Tukey method. Do this by hand and show your work. You may use R to check your answers. Summarize your results using letter codes. What do you conclude?

b) What would have been the multiplier if Fisher’s LSD method had been used? Bonferroni? Use a t table. You may check your answer in R. You do not need to make the complete CIs for this question, just give the values of the multipliers.

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Answer: ---- Date: ----1/8/2019

orchestra answered 1 year ago

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