M7 Assignment 3: Course Project Task XII
4- Write up the results of your prescreening of the data:
b- Report the descriptive statistics for each of the continuous variables in the set
|
Statistics |
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|
|
Beck Depression Inventory Score at Current Intake |
Full-Scale IQ Score |
Age at time of first diagnosis with depression (mood disorder) |
Number of Yrs of completed education |
Beck Depression Inventory Score at end of 12 wks |
Total Self-Efficacy Score |
|
|
N |
Valid |
60 |
59 |
59 |
60 |
60 |
60 |
|
|
Missing |
29 |
30 |
30 |
29 |
29 |
29 |
|
Mean |
36.60 |
99.83 |
24.90 |
12.87 |
33.85 |
39.20 |
|
|
Median |
36.00 |
99.00 |
22.00 |
13.00 |
29.00 |
40.00 |
|
|
Mode |
34a |
90 |
18 |
12 |
26 |
26a |
|
|
Std. Deviation |
6.510 |
7.618 |
12.299 |
1.455 |
26.776 |
11.115 |
|
|
Variance |
42.380 |
58.040 |
151.265 |
2.118 |
716.977 |
123.553 |
|
|
Minimum |
25 |
89 |
9 |
10 |
15 |
19 |
|
|
Maximum |
56 |
122 |
50 |
17 |
230 |
65 |
|
|
Sum |
2196 |
5890 |
1469 |
772 |
2031 |
2352 |
|
|
a. Multiple modes exist. The smallest value is shown |
c- Report separately the results of your evaluations for outliers and normality for each of the continuous variables.
· Evaluation for normality
|
Descriptives |
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|
|
Statistic |
Std. Error |
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|
Beck Depression Inventory Score at Current Intake |
Mean |
36.60 |
0.840 |
|
|
|
|
95% Confidence Interval for Mean |
Lower Bound |
34.92 |
|
|
|
|
|
Upper Bound |
38.28 |
|
|
|
|
5% Trimmed Mean |
36.43 |
|
|
|
|
|
Median |
36.00 |
|
|
|
|
|
Variance |
42.380 |
|
|
|
|
|
Std. Deviation |
6.510 |
|
|
|
|
|
Minimum |
25 |
|
|
|
|
|
Maximum |
56 |
|
|
|
|
|
Range |
31 |
|
|
|
|
|
Interquartile Range |
8 |
|
|
|
|
|
Skewness |
0.522 |
0.309 |
1.689489154 |
|
|
|
Kurtosis |
0.127 |
0.608 |
0.208151504 |
|
|
Full-Scale IQ Score |
Mean |
99.83 |
0.992 |
|
|
|
|
95% Confidence Interval for Mean |
Lower Bound |
97.85 |
|
|
|
|
|
Upper Bound |
101.82 |
|
|
|
|
5% Trimmed Mean |
99.46 |
|
|
|
|
|
Median |
99.00 |
|
|
|
|
|
Variance |
58.040 |
|
|
|
|
|
Std. Deviation |
7.618 |
|
|
|
|
|
Minimum |
89 |
|
|
|
|
|
Maximum |
122 |
|
|
|
|
|
Range |
33 |
|
|
|
|
|
Interquartile Range |
10 |
|
|
|
|
|
Skewness |
0.540 |
0.311 |
1.73673576 |
|
|
|
Kurtosis |
0.027 |
0.613 |
0.043359926 |
|
|
Age at time of first diagnosis with depression (mood disorder) |
Mean |
24.90 |
1.601 |
|
|
|
|
95% Confidence Interval for Mean |
Lower Bound |
21.69 |
|
|
|
|
|
Upper Bound |
28.10 |
|
|
|
|
5% Trimmed Mean |
24.35 |
|
|
|
|
|
Median |
22.00 |
|
|
|
|
|
Variance |
151.265 |
|
|
|
|
|
Std. Deviation |
12.299 |
|
|
|
|
|
Minimum |
9 |
|
|
|
|
|
Maximum |
50 |
|
|
|
|
|
Range |
41 |
|
|
|
|
|
Interquartile Range |
18 |
|
|
|
|
|
Skewness |
0.820 |
0.311 |
2.635926975760990 |
|
|
|
Kurtosis |
-0.426 |
0.613 |
-0.694504139 |
|
|
Number of Yrs of completed education |
Mean |
12.87 |
0.188 |
|
|
|
|
95% Confidence Interval for Mean |
Lower Bound |
12.49 |
|
|
|
|
|
Upper Bound |
13.24 |
|
|
|
|
5% Trimmed Mean |
12.80 |
|
|
|
|
|
Median |
13.00 |
|
|
|
|
|
Variance |
2.118 |
|
|
|
|
|
Std. Deviation |
1.455 |
|
|
|
|
|
Minimum |
10 |
|
|
|
|
|
Maximum |
17 |
|
|
|
|
|
Range |
7 |
|
|
|
|
|
Interquartile Range |
2 |
|
|
|
|
|
Skewness |
0.615 |
0.309 |
1.992929283 |
|
|
|
Kurtosis |
0.115 |
0.608 |
0.189036631 |
|
|
Beck Depression Inventory Score at end of 12 wks |
Mean |
33.85 |
3.457 |
|
|
|
|
95% Confidence Interval for Mean |
Lower Bound |
26.93 |
|
|
|
|
|
Upper Bound |
40.77 |
|
|
|
|
5% Trimmed Mean |
30.69 |
|
|
|
|
|
Median |
29.00 |
|
|
|
|
|
Variance |
716.977 |
|
|
|
|
|
Std. Deviation |
26.776 |
|
|
|
|
|
Minimum |
15 |
|
|
|
|
|
Maximum |
230 |
|
|
|
|
|
Range |
215 |
|
|
|
|
|
Interquartile Range |
10 |
|
|
|
|
|
Skewness |
6.868 |
0.309 |
22.2499658 |
|
|
|
Kurtosis |
50.895 |
0.608 |
83.64115549 |
|
|
Total Self-Efficacy Score |
Mean |
39.20 |
1.435 |
|
|
|
|
95% Confidence Interval for Mean |
Lower Bound |
36.33 |
|
|
|
|
|
Upper Bound |
42.07 |
|
|
|
|
5% Trimmed Mean |
39.09 |
|
|
|
|
|
Median |
40.00 |
|
|
|
|
|
Variance |
123.553 |
|
|
|
|
|
Std. Deviation |
11.115 |
|
|
|
|
|
Minimum |
19 |
|
|
|
|
|
Maximum |
65 |
|
|
|
|
|
Range |
46 |
|
|
|
|
|
Interquartile Range |
18 |
|
|
|
|
|
Skewness |
-0.018 |
0.309 |
-0.057829225 |
|
|
|
Kurtosis |
-0.767 |
0.608 |
-1.261135222 |
Conclusion according to skewness and kurtosis the data are little skewed and kurtotic, but it does not differ significantly from normality, except the variable of Beck Depression Inventory Score at end of 12 wks has large skewed and kurtotic.
We can assume that our data are approximately normal distributed, in term of skewness and kurtosis except the variable of Beck Depression Inventory Score at end of 12 wks.
· evaluations for outliers