Between Subjects ANOVA testing

Statistics
Tutor: None Selected Time limit: 1 Day

Look at the effects drinks have on peoples sociability

1= low sociability

20= high sociability

Water | Soda | Non-Alcoholic Beer | Beer

9  12  16  17

6  13  19  18

7  14  18  16

9  13  19  19

10  15  20  19

12  15  20  19

13  9  17  17

6  12  16  16

8  13  20  17

7  15  18  18

a) Conduct an appropriate Between Subjects ANOVA on these data. If you get a significant F-statistic, conduct a Tukey’s HSD post-hoc test, as well as produce a bar graph of the means. 

May 18th, 2015
one way anova.xlsx

a)


SS
dF
MS
F
P
Between
50
9
5.55
.252
.983
Within
662.7
30
22.09


Total
712.7
39



P > 0.05, so no need for post-hoc.

Bar graph included in Excel file above :)


May 18th, 2015

Thanks for the swift response but I am confused by your bar graph! Shouldn't there be only 4 means on the bar graph and not 10 like you have due to their only being 4 categories? ( Water, Soda N/a Beer, and beer) respectively?

May 18th, 2015

Oh! Yes, that is another way to do it. The question didn't specify if it wanted the bar graph to be done by means based on the 10 data sets or the total categories for each data set.

Because ANOVA is calculated by the data sets themselves, I defaulted to the bar graph I gave you. It's equally valid to only use the 4 means. My apologies for not responding to you fast enough! I just got into work.

May 18th, 2015

Let me make that up to you: I'll happily help you for free with another question.

May 18th, 2015

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