1.Does stress level affect number of sick days taken? A health psychologist meas
ID: 3365994 • Letter: 1
Question
1.Does stress level affect number of sick days taken? A health psychologist measured the stress level of 30 people who worked in the same office building. He divided his sample into three equally sized groups based on stress level – low, medium, and high. Then, he obtained the number of sick days taken in the last year from the offices. The average number of sick days was 4.2, 5.2, and 7.9 for the low, medium, and high stress groups, respectively. The one-way ANOVA source table is as follows:
Source
SS
df
MS
F
Between
73.267
2
36.633
1.894
Within
522.10
27
19.337
--
Total
595.367
29
--
--
a.Is it necessary to conduct follow-up analyses? How did you determine this?
b.If follow-up analyses are necessary, compute and report an effect size measure and the results using Tukey’s HSD Test post hoc test.
Source
SS
df
MS
F
Between
73.267
2
36.633
1.894
Within
522.10
27
19.337
--
Total
595.367
29
--
--
Explanation / Answer
for 2 degree of freedom in numerator and 27 in denominator with test statistic F=1.894 ; p value =0.1699
as p value is high we do not have sufficient evidence to conclude that mean value of groups are different.
therefore we do not require post hoc analysiis
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