Quantile Plots

How to do it

The upper and lower bars represent the 90th and 10th percentiles respectively. The red bar in the middle of each box represents the median. The box extends from the 25th to the 75th percentile. The blue dot is the mean with lines extending one standard error of the mean in each direction. The dotted line is the mean averaging across all groups.


Descriptive Statistics
How to do this

leniency By Condition
Means and Std Deviations
Level   Number    Mean   Std Dev Std Err Mean
false     34   5.36765   1.82700   0.31333
felt      34   4.91176   1.68087   0.28827
miserable 34   4.91176   1.45368   0.24930
neutral   34   4.11765   1.52285   0.26117


Detailed Descriptive Statistics
How to do this
false
Quantiles
maximum 100.0% 9.0000
         99.5% 9.0000
         97.5% 9.0000
         90.0% 8.0000
quartile 75.0% 6.5000
median   50.0% 5.5000
quartile 25.0% 3.5000
         10.0% 3.0000
          2.5% 2.5000
          0.5% 2.5000
minimum   0.0% 2.5000

Moments
Mean           5.36765
Std Dev        1.82702
Std Error Mean 0.31333
Upper 95% Mean 6.00512
Lower 95% Mean 4.73017
N            34.00000
Sum Weights  34.00000
Sum         182.50000
Variance      3.33801
Skewness      0.08284
Kurtosis     -0.98709
CV           34.03769
felt
Quantiles
maximum 100.0% 9.0000
         99.5% 9.0000
         97.5% 9.0000
         90.0% 7.2500
quartile 75.0% 6.1250
median   50.0% 4.7500
quartile 25.0% 3.5000
         10.0% 3.0000
          2.5% 2.5000
          0.5% 2.5000
minimum   0.0% 2.5000

Moments
Mean           4.91176
Std Dev        1.68087
Std Error Mean 0.28827
Upper 95% Mean 5.49824
Lower 95% Mean 4.32529
N             34.00000
Sum Weights 34.00000
Sum         167.00000
Variance      2.82531
Skewness      0.68614
Kurtosis     -0.13069
CV           34.22123
miserable
Quantiles
maximum 100.0% 8.0000
         99.5% 8.0000
         97.5% 8.0000
         90.0% 7.7500
quartile 75.0% 5.5000
median   50.0% 4.7500
quartile 25.0% 4.0000
         10.0% 3.2500
          2.5% 2.5000
          0.5% 2.5000
minimum   0.0% 2.5000

Moments
Mean           4.91176
Std Dev        1.45368
Std Error Mean 0.24930
Upper 95% Mean 5.41897
Lower 95% Mean 4.40455
N             34.00000
Sum Weights 34.00000
Sum         167.00000
Variance      2.11319
Skewness      0.72039
Kurtosis      0.03606
CV           29.59592
neutral
Quantiles
maximum 100.0% 8.0000
         99.5% 8.0000
         97.5% 8.0000
         90.0% 6.2500
quartile 75.0% 5.1250
median   50.0% 4.0000
quartile 25.0% 2.8750
         10.0% 2.2500
          2.5% 2.0000
          0.5% 2.0000
minimum   0.0% 2.0000

Moments
Mean           4.11765
Std Dev        1.52285
Std Error Mean 0.26117
Upper 95% Mean 4.64899
Lower 95% Mean 3.58630
N             34.00000
Sum Weights 34.00000
Sum         140.00000
Variance      2.31907
Skewness      0.54869
Kurtosis     -0.26987
CV           36.98351



Dunnett's Test

How to do it

Note there is no overlap of the dark red and the grey indicating that the false and neutral conditions are significantly different. The light red and the dark red overlap indicating no differences between either felt or miserable eith neutral.


leniency By Condition
Means Comparisons
              Dif=Mean[i]-Mean[j]    false        felt   miserable    neutral
                       false         0.00000    0.45588    0.45588    1.25000
                       felt         -0.45588    0.00000    0.00000    0.79412
                       miserable    -0.45588    0.00000    0.00000    0.79412
                       neutral      -1.25000   -0.79412   -0.79412    0.00000

Alpha=    0.05
Comparisons with a control using Dunnett's Method
|d|
2.37635
Abs(Dif)-LSD     neutral
false            0.311968
felt            -0.14391
miserable       -0.14391
neutral         -0.93803

Positive values show pairs of means that are significantly different.


The table above shows the difference between absolute value of the difference between means and the size of the difference needed to be significant (Least Significant Difference or LSD). A positive value indicates that the difference between means is larger than the LSD and therefore the comparison is significant. Only the difference between the false smile and neutral expression is significant.




Comparing the average of the three smile conditins with the control
How to do it.




Comparing the smile conditions
How to do it.



Since three contrasts are being tested, you should use the .05/3 = 0.01667 significance level. Note that the warning of the non-testable contrast refers to the sums of squares at the bottom of the output that provides a combined test of all contrasts. It is meaningless in this case because the contrasts are not orthogonal. However, the tests of the three contrasts individually are valid and correct.