Mean, Median, Mode, and Range

Median

For an ordered data set with an odd number of values, The median is the middle value. For an ordered set with an even number of values, the median is the average of the two middle values.

Find the mean of the following set of numbers. {66,72,83,89}

Mean= 66+72+83+88/4 = 310/4 = 77.5

Find the median of the following set of numbers. {65,72,81,83,89}

Median= 81

Find the mode of the following set of numbers. {65,65,71,72,81,83,83,83,89}

Mode= 83

Find the range of the following set of numbers. {65,65,71,72,81,83,83,83,89}

Range= 89-65 = 24

Range

The difference of the greatest and the least values in the data set.

Mean

The sum of all the values in a data set divided by the number of data sets. Also called the average.

Mode

The value which occurs most frequently in a data set.