This problem walks you through how to run an example ANOVA in SPSS when data is presented in a parallel (tabular) format.  In other words, the data is presented with each sample in its own column:

Placebo	Drug A	Drug B	Drug C
3	4	6	7
0	3	3	6
2	1	4	5
0	1	3	4
0	1	4	3

However, for SPSS, this must be converted to a 2-column (serial) format.  The first column will indicate the group (the levels of the factor...which must be coded as Nominal or Ordinal in SPSS), and the second column will be the data:

group	time
1	3
1	0
1	2
1	0
1	0
2	4
2	3
2	1
2	1
2	1
3	6
3	3
3	4
3	3
3	4
4	7
4	6
4	5
4	4
4	3

With the data in this format, you can follow the instructions on how to run a single-factor fixed ANOVA.  When you run the ANOVA, you should obtain the same ANOVA summary table as shown:

	SS	df	MS	F-ratio	sign.
Between	50	3	16.67	$\displaystyle {F}={8.33}$	$\displaystyle {p}={0.001}$
Within	32	16	2.00
TOTAL	82	19

Run the ANOVA to confirm that you get the same results.

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Now, we will change the data slightly (one treatment has been changed):

Placebo	Drug A	Drug B	Drug C
5	4	6	7
2	3	3	6
4	1	4	5
2	1	3	4
2	1	4	3

Rerun the ANOVA and fill in the summary table with the results obtained from SPSS.

	SS	df	MS	F-ratio	sign.
Between		3
Within		16
TOTAL		19

(Report P-value & F-ratio accurate to 3 decimal places and all other values accurate to 2 decimal places.)