Information Technology Reference
In-Depth Information
Statistics
therapy
GAFscore
N
Valid
Missing
15
15
0
0
Mean
Median
Mode
Std. Deviation
Variance
Skewness
Std. Error of Skewness
Kurtosis
Std. Error of Kurtosis
Range
Minimum
Maximum
2.00
58.73
2.00
60.00
1
a
50
a
.845
12.736
.714
162.210
.000
-.551
.580
.580
-1.615
-1.047
1.121
1.121
2
37
1
35
3
72
a.
Multiple modes exist. The smallest value is shown
Figure 5.8
Descriptive statistics for our variables.
of four sections:
Percentile Values
,
Dispersion
,
Central Tendency
,and
Distribution
. In the present example, we ask for the
Mean
,
Median
,
Mode
,
Standard deviation
,
Va r i anc e
,
Range
,
Minimum
,
Maximum
,
Skewness
,
and
Kurtosis
values for each variable. Some of this information will
be used to help make data-cleaning assessments and other information
will be used to help assess statistical assumption violations. Clicking the
Continue
pushbutton returns us to the main dialog window. Click on
OK
to obtain the output file with the results.
Figure 5.8 displays the
Statistics
output for both variables (therapy and
GAF). Neither variable contained any missing values, nor were there any
extreme minimum and maximum values. Figures 5.9 and 5.10 provide a
separate
Frequency Table
for therapy and GAFscore, respectively. For the
categorical variable therapy, participants were evenly distributed across
all three levels. For the continuous variable GAFscore, the scores showed
good variability from a low of 35 to a high of 72, indicating reasonable
values within published ranges.
Type of Therapy
Cumulative
Percent
Frequency
Percent
Valid Percent
Valid
Brief
Psychodynamic
Cognitive-Behavioral
Total
5
33.3
33.3
33.3
5
33.3
33.3
66.7
5
33.3
33.3
100.0
15
100.0
100.0
Figure 5.9
Frequency table for type of therapy.
