Homework Answers
The variability can be measured by coefficient of variation which is =standard deviation/mean
Now, we will calculate the coefficients of variation for 5th graders and norm groups for each subject.
Geo Eng Spl Sc
5th g 12/75=0.16 10/100=0.1 12/125=0.096 20/90=0.222
Norm 10/85=0.1176 10/100=0.1 15/120=0.125 15/90=0.1667
So, we can see that variability in 5th grader is higher than the norm group in both Geography and Science.
So, (b) and (c) will be correct options.
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