Stat

6. A researcher is interested in the effects of sun exposure therapy on depression scores. It is hypothesized that sun exposure won't have an effect until there is a moderate amount of exposure, and then the effect will level off. Twelve participants are recruited and each takes part in 4 different sun exposure conditions (counterbalanced). Following each condition they are given a depression test (higher scores indicate greater depression). The results follow. Create an ANOVA summary table and conduct follow-up tests, if necessary, and give conclusions. Sun Exposure Therapy Control Low Moderate High means 72.4 70.8 60.5 42.8 sssubj = 6258.36 sst = 21644.82 7. A group of 8 rats are run through a maze and the number of errors they make are recorded. They are tested on the maze when they are 12 months, 18 months, 24 months and 30 months old. It is hypothesized that they will make fewer errors at 18 months compared to 12 months, and then their performance will begin to decline with age. Create an ANOVA summary table, conduct appropriate tests, and make conclusions. Time 1 Time 2 Time 3 Time 4 means 5.13 5.25 5.00 5.75 SSgubj = 32.22 SS, = 42.47