A scientist is interested in how chemotherapy affects spatial memory. The first phase of the experiment is to train a large group of rats (N=25) to learn a complex maze. After training for 30 days, the researcher wants to show that during the last 5 days of training all rats have hit their steady state performance in terms of completion time (in seconds). The collected data are in animal_maze_learning.csv. These data are the completion times for each rat over the last five days of training.
Use Repeated-measures ANOVA
1. Provide a compelling graph of the data.
2. What is the statistical hypothesis, and which statistical test is most appropriate? Are follow-up comparisons needed?
The statistical hypothesis is Dunnett’s multiple comparisons test is most appropriate. No follow-up comparisons are needed.
3. Provide the appropriate descriptive statistics.
4. Provide a numeric description of the statistical hypothesis test result and follow-up comparisons (if needed)
5. Provide a verbal description of the scientific result (not just reject/fail to reject the null hypothesis). Should the second phase of the experiment be started?
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