In high school a teacher gave two sections of a class the sa

In high school, a teacher gave two sections of a class the same test. The results were as follows: Section I: Mean = 80, Standard deviation = 6.5 Section II: Mean = 80, Standard deviation = 2.2 Which of the following conclusions is supported by the data?

a. On average, Section I did better than Section II.

b. On average, Section I did worse than Section II.

c. Section I was more homogeneous than Section II.

d. Section I was less homogeneous than Section II.

Solution

As the variance is higher for the first section, so we can say that the Section II was more homogeneous and as the mean value is same for both so we will say that both sections did equally well.

So, option d is correct