Question

Four (4) Vikings tennis players took their
statistics midterm exam early, so that they can
attend Ojai tournament. The mean on their
exam is 84 and the variance is 0 (zero). What
score did each of the 4 students earn?

Answer 1

Using the statistical concepts of mean and variance, it is found each of the 4 students earned a score of 84.

What are the mean and the variance of a data-set?

• The mean of a data-set is given by the sum of all observations in the data-set divided by the number of observations.

• The variance is given by the sum of the differences squared of each observation and the mean, divided by the number of observations.

In this problem, we have that:

• The mean is of 84.

• The variance is of 0, which means that the sum of the differences squared of each observation and the mean is of 0, hence all students scored the mean, that is, they had a score of 84.

More can be learned about the statistical concepts of mean and variance at https://brainly.com/question/25639778