Question

A pharmaceutical company has developed a drug that is expected to reduce hunger. To test the drug, three samples of rats are selected with n=12 in each sample. The first sample receives the drug every day. The second sample is given the drug once a week, and the third sample receives no drug at all (the control group). The dependent variables is the amount of food eaten by each rat over a 1-month period. These data are analyzed by an ANOVA, and the results are reported in the following summary table. Fill in all missing values in the table. (Hint: Start with the df column.)

	S.S.	d.f.	M.S.	F
Between				3.04
Within			3.32
TOTAL

Use the =FDIST(F, df_treatment, df_error) function in Excel to locate the p-value for this ANOVA:
p-value =  
Report answer accurate to at least 4 decimal places.

If you use a significance level of α=.05, what would you conclude about these treatments?

• These data do not provide evidence of a difference between the treatments
• There is a significant difference between treatments

Answer 1