A teacher distributed two tests to a group of 40 pupils and obtained the following results:
A mean of 6 for the first test with a standard deviation of 1.5 and a mean of 4 for the second test with a standard deviation of 0.5.
A pupil obtains a score of 6 in the first test and 5 in the second. With regard to the rest of the group: in which of the two tests did he obtain a better score?
He obtains a higher score in the second test with regard to the rest of the group.