Developing a Mobile APP-Supported Learning System for Evaluating Health-Related Physical Fitness Achievements of Students
Table 9
The results of t-test for the demographic variables on students’ system usability (experimental group).
Group
Descriptive statistics
t-test
Mean
SD
T value
Gender
Male
22
75.0
15.21
0.21
0.83
Female
26
74.1
12.84
Grade
Grade 4
21
75.2
14.7
0.31
0.75
Grade 6
27
73.9
13.3
Phone usage experience
Weekly phone using times <5
25
74.3
13.3
−0.12
0.90
Weekly phone using times ≥5
23
74.7
14.6
Exercise habit
Weekly exercise minutes ≤80
22
69.7
11.7
−2.29
0.02
Weekly exercise minutes >80
26
78.5
14.4
Beverage drinking habit
Beverage per week (cans) <3
24
75.2
11.7
0.34
0.73
Beverage per week (cans) ≥3
24
73.8
15.8
BMI
BMI ≤ 2
38
77.1
13.7
2.67
0.01
BMI > 2
10
64.7
9.1
System usability is only rating in posttest, and it’s score is a number, exercise habit: weekly exercise minutes >80, no exercise habit: weekly exercise minutes ≤80; low BMI: BMI ≤ 2, high BMI: BMI > 2, .
