# Mean and Median

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How can the mean and median be used to estimate how well a class does on a test?

Explain how extreme value changes each and when each one is appropriate.

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The expert examines mean and median by use to estimate how well a class does on a test. A complete, neat and step-by-step solution is provided.

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(a) The mean of a set of numerical data is the sum of the set divided by the number of observations, that is, their average. Therefore, by calculating the mean score for a class of students, we can determine the performance of the class on an average. This is the simplest measure to calculate.

The median of a distribution is the value which divides the distribution so that an equal number of values lie on either ...

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