Question

Run a one-way independent ANOVA in SPSS. Compare several means using SPSS and compare several independent Means, the significance of the results. I am not sure if there are three independent variables. If is what is a post hoc test to run in SPSS group exam

group	exam
1.00	50.00
1.00	45.00
1.00	48.00
1.00	47.00
1.00	45.00
1.00	49.00
1.00	50.00
1.00	54.00
1.00	57.00
1.00	55.00
2.00	63.00
2.00	55.00
2.00	54.00
2.00	49.00
2.00	65.00
2.00	46.00
2.00	53.00
2.00	67.00
2.00	58.00
2.00	50.00
3.00	71.00
3.00	67.00
3.00	68.00
3.00	62.00
3.00	65.00
3.00	58.00
3.00	63.00
3.00	69.00
3.00	70.00
3.00	61.00

Answer 1

Between Group 1 and 2, P-Value is 0.047<0.05 That is statistically significant.

Between Group 1 and 3, P-Value is 0.000<0.05 That is statistically significant.

Between Group 2 and 3, P-Value is 0.002<0.05 That is statistically significant.

We reject the null hypothesis, So group 1, 2 and 3 are different group.