Biostatistics Final Assessment

Running head: BIOSTATISTICS FINAL ASSESSMENT 1
CHAT Program Data Analysis
Student’s Name
Institutional Affiliation

BIOSTATISTICS FINAL ASSESSMENT 2
CHAT Program Data Analysis
Question 1
This is a study that involves a sample of 851 students. It involves the analysis of the
sexual health education program (CHAT) which was adopted by public schools in Columbia. The target
group was students, parents and their respective students. The survey was conducted through interviews
and sexual knowledge score.
Part 1
Health
Knowledge
Score (8th
Grade) Gender Race
Total
Family
Annual
Income
Reported
Negative
Body
Image
Sexually
Active
Participated
in Risk
Behavior
Health
Knowledge
Score
(12th
Grade)
Accessed
Sexual
Health
Resource
s
Graduated
High
School
N 851 851 851 851 851 851 851 851 851 851
Mean 51.582 0.864
3.58
6 9.522 0.904 0.526 0.821 52.297 0.731 0.919
Median 52.770 1.000
4.00
0 10.000 1.000 1.000 1.000 52.130 1.000 1.000
Mode 68.090 1.000
4.00
0 11.000 1.000 1.000 1.000 70.550 1.000 1.000
Std.
Deviation 9.448 0.343
0.90
1 2.187 0.412 0.500 0.383 9.743 0.444 0.273
Variance 89.260 0.118
0.81
2 4.784 0.170 0.250 0.147 94.918 0.197 0.075
Skewness -0.333 -2.124
-
1.59
3 -1.319 -0.669 -0.106 -1.681 0.081 -1.043 -3.075
Kurtosis -0.904 2.516
1.62
6 1.625 2.293 -1.993 0.828 -0.972 -0.914 7.472
Range 38.440 1.000
4.00
0 11.000 2.000 1.000 1.000 38.200 1.000 1.000
Minimum 29.650 0.000
1.00
0 1.000 0.000 0.000 0.000 32.350 0.000 0.000
Maximum 68.090 1.000
5.00
0 12.000 2.000 1.000 1.000 70.550 1.000 1.000
Table 1: Descriptive Statistics
The results as shown in table 1 shows that the average health knowledge score of 8th-
grade students was (M=51.58, S.D=9.448) out of the possible 100 marks. This is an average
score that shows that students are fairly acquainted with sexual health knowledge. The score has
a general variance of 89.26 marks. The highest score by the students was 68.09 while the

BIOSTATISTICS FINAL ASSESSMENT 3
minimum was 29.65 marks. This shows a big difference (range) of 38.44 between the highest
and lowest student. The most common score was 68.09 hence some students are well above
average in the subject. The Skewness and kurtosis values are -.333 and -.904 respectively. These
statistics show the peakedness and Skewness of the distribution. A negative value shows that
many students score lie more on the left side (lower side).
Figure 1: 8th-grade health knowledge assessment score vs Gender Histograms
The selected demographic value, in this case, was gender. The histogram above shows the
distribution of score across the student’s gender. In both cases, score range from about 28 to 69
marks. The female histogram shows many scores skewed on the negative side hence the
distribution of scores is not normal. Most female students have low scores though have a higher
mean score than males. The male distribution is also skewed to the negative side though it tends
almost to being normal.
Table 2: 8th-grade health knowledge assessment score vs Gender
Group Statistics 95% Confidence