Mean, Median, Mode, Range

Front

What is the mean of a data set?

Back

The mean (average) is calculated by adding all the data points together and dividing by the number of data points.

Front

How do you find the median of a data set?

Back

To find the median, arrange the data points in order from smallest to largest. If there is an odd number of data points, the median is the middle number. If there is an even number, it is the average of the two middle numbers.

Front

What is the mode of a data set?

Back

The mode is the value that appears most frequently in a data set. A data set can have one mode, more than one mode, or no mode at all.

Front

How do you calculate the range of a data set?

Back

The range is calculated by subtracting the smallest value from the largest value in the data set.

Front

Can a data set have more than one mode?

Back

Yes, a data set can have multiple modes if multiple values appear with the same highest frequency.

Front

What is the range of the following data set: 5, 15, 10, 20, 15, 10, 15?

Back

The range is 15 (20 - 5 = 15).

Front

What is the range of Roger's bowling scores: 155, 165, 138, 172, 127, 193, 142?

Back

The range is 66 (193 - 127 = 66).

Front

If a data set has the values 2, 4, 4, 6, 8, what is the mode?

Back

The mode is 4, as it appears most frequently.

Front

What happens to the mean if you add a new value that is much larger than the existing values?

Back

The mean will increase, as the new value will raise the average.

Front

What is the median of the following data set: 3, 1, 4, 2?

Back

The median is 2.5 (after arranging: 1, 2, 3, 4, the average of 2 and 3).