How to calculate eta square. Look at your ANOVA output table. You need to locate the numbers that intersect with the column "SS" (sum of squares) and the three rows listed, Between Groups, Within Groups, and Total. Eta square is calculated with the following division:

• SSbetween/SStotal

As an example: If SS between is 18 and SS total is 140, then my formula is 18/140 = 0.12857

This would mean that 12.86% of the total amount of variance is accounted for by my independent variable.

Guidelines for interpreting how big an effect size is using eta square:

• Less than 0.2 = no effect
• 0.2 - 0.5 = Small to medium effect size
• 0.5 - 0.8 = Medium to large effect size
• Over 0.8 = Large effect size.

Week 7 Final Project Statistical Analysis - Other Info:

1. One of the assignment instructions state to perform a Tukey Range test. This is Tukey's HSD value in which you use the difference between group means to judge whether any particular set of two groups differed from each other. Remember that the HSD value is an absolute number! As an example, +/-2.5 This means that if I have a group comparison that is -2.6, then that IS a significant difference --> there is a significant difference between those two groups because it exceeds Tukey's HSD value.
2. You also need to do a bar graph. Bar graph or histogram is fine. Remember that when graphing, the independent variable (which is also referred to as the X variable) goes along the bottom; the horizontal axis. It essentially labels the columns. The dependent variable (which is also referred to as the Y variable) goes on the vertical axis.

i NEW INSTALL DETECTED Your new install of Microsoft Office Home and Student 2019 has newer features than your current version. Do you want to activate the new install? Yes No Thanks E1 X V fx HOURS - "If working full or part time, how many hours did you work last week at all jobs?" Mental Health - "Thinking about your mental health, which includes stress, depression, and problems with emotions, for how many days during the past 30 days was your mental health not good?" B D F G H K M IN Group 1: Group 2: Group 3: 10 - 30 31 - 39 41+ hours hours hours worked/w worked/w worked/w eek HOURS - "If working full or part time, how many hours did you work last week at all jobs?" eek eek Mental Health - "Thinking about your mental health, which includes stress, depression, and problems with emotions, for how many days during the past 30 days was your N 0 20 0 0 The numbers listed under each group are the number of days reported of poor mental health. Note there are 50 subjects per group. 30 0 3 0 o 2 Mean Grp1 - Mean Grp2 Mean Grp1 - Mean Grp3 Mean Grp2 - Mean Grp3 0 3 MSw HSD = q(Range) 0 0 15 n 10 00 - 30 0 0 o O HSD = 3.29 W N DOOWNODOW o o O W J N U O O o O O O O 5 22 ow O 0 0 23 0 0 24 0 0 + 25 0 0 0 26 10 10 10 27 30 0 0 28 30 29 5 0 0 Sheet1 Edit Accessibility: Investigate Ready for fun? 99+ 6:03 PM Q Search P W O 6/14/2024