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# IN A STUDY OF THE EFFECTS OF STRESS ON ILLNESS, A RESEARCHER

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Author: Christine Farr
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http://theperfecthomework.com/in-a-study-of-the-effects-of-stress-on-illness-a-researcher-tallied-the-number-of-colds-people-contracted-during-a-6-month-period-as-a-function-of-the-amount-of-stress-they-reported-during-that-same-time-period/

In a study of the effects of stress on illness, a researcher tallied the number of coldspeople contracted during a 6-month period as a function of the amount of stress they reportedduring that same time period. There were three stress levels: minimal, moderate, and highstress. The sums of squares appear in the followingANOVA summary table. The meanfor each condition and the number of subjects precondition are also noted.SourcedfSSBetween groupMSF22.167Within groups14.750Total36.917Stress LevelMeanNMinimal34Moderate44High64a) Complete the ANOVA summary table.b) Is Fobt significant at α = .05; at α = .017c) Perform post hoc comparisons if necessary.d) What conclusions can be drawn from the F – ratioand the post hoc comparision?e) What is the effect size the effect size, and what does this mean?f)Graph the means.#2A researcher conducted an experiment on the effects of a new “drug” on depression.The researcher had a control group that received nothing, a placebo group, and anexperimental group that received the “drug”. A depression inventory that provide a measure ofdepression on a 50-point scale was used (50 indicates that anindividual is very high on thedepression variable). The ANOVA summary table appears next, along with the mean depressionscore for each condition.

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