Displaying 2 results from an estimated 2 matches for "flat_550_w_realism_ah".
2011 Jan 04
1
t-test or ANOVA...who wins? Help please!
...e is significant difference.
Instead in the 2 ways anova we see that there is no significant difference in
the interaction stimulus:condition.
Why this happen? Where is the error?
I report the data and the analysis so you can see:
1) t-test:
flat_550_W_realism =c(3,3,5,3,3,3,3,5,3,3,5,7,5,2,3)
flat_550_W_realism_AH =c(7,4,5,3,6,5,3,5,5,7,2,7,5, 5)
#First I check homeschedaicity:
> var.test(flat_550_W_realism,flat_550_W_realism_AH)
F test to compare two variances
data: flat_550_W_realism and flat_550_W_realism_AH
F = 0.7486, num df = 14, denom df = 13, p-value = 0.597
alternative hypothesis: true ratio...
2011 Jan 05
2
Problem with 2-ways ANOVA interactions
...*' 0.05 '.' 0.1 ' ' 1
#As you can see the p-value for stimulus:condition is high.
#Now I do the t-test with the same values of the table concerning the stimulus
presented in A and AH conditions:
flat_550_W_realism =c(3,3,5,3,3,3,3,5,3,3,5,7,5,2,3)
flat_550_W_realism_AH =c(7,4,5,3,6,5,3,5,5,7,2,7,5, 5)
> t.test(flat_550_W_realism,flat_550_W_realism_AH, var.equal=TRUE)
Two Sample t-test
data: flat_550_W_realism and flat_550_W_realism_AH
t = -2.2361, df = 27, p-value = 0.03381
alternative hypothesis: true difference in means is not eq...