A statistics test has a mean of 60 and a standard deviation of 10 while an accounting test has a mean of 30 and a variance of 16. Where are the grades more variable??

Question

How can i get it if i don’t have the X

Answer 1

The standard deviation for the accounting test is equal to the square root of the variance, which is 4.

Since the standard deviation of the statistics test (10) is greater than the standard deviation of the accounting test (4), the statistics test is more variable.