To compare the two classes, the Coefficient of Variation (COV) can be used.
The formula for COV is this:
C = s / x
where s is the standard deviation and x is the mean
For the first class:
C1 = 10.2 / 75.5
C1 = 0.1351 (13.51%)
For the second class:
C2 = 22.5 / 75.5
C2 = 0.2980 (29.80%)
The COV is a test of homogeneity. Looking at the values, the first class has more students having a grade closer to the average than the second class.
y=7 i got this answer cause i realized that 12 is only 3 numbers away from 9 so i added 3 to 4 and 3+4=7
hope it helps
63/9 + 40 - 35/7 =
7 + 40 - 5 =
47 - 5 =
42 <==
