Measures of Central Tendency

Front

What is the median in a data set?

Back

The median is the middle number in an ordered set of data. If there is an even number of observations, the median is the average of the two middle numbers.

Front

How do you find the mode of a data set?

Back

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

Front

What is the mean of the following data set: 4, 8, 6, 5, 3?

Back

Mean = (4 + 8 + 6 + 5 + 3) / 5 = 26 / 5 = 5.2

Front

What is the range of the following data set: 10, 15, 20, 25, 30?

Back

Range = Maximum value - Minimum value = 30 - 10 = 20

Front

If a data set has the values 2, 3, 3, 5, 7, what is the mode?

Back

The mode is 3, as it appears most frequently.

Front

What does it mean if a data set is bimodal?

Back

A bimodal data set has two modes, meaning there are two values that occur most frequently.

Front

Calculate the median of the following scores: 12, 15, 10, 20, 18.

Back

First, order the data: 10, 12, 15, 18, 20. The median is 15.

Front

What is the formula for calculating the mean?

Back

Mean = (Sum of all values) / (Number of values)

Front

Find the mode of the following data set: 1, 2, 2, 3, 4, 4, 4, 5.

Back

The mode is 4, as it appears most frequently.

Front

What is the difference between mean and median?

Back

The mean is the average of all values, while the median is the middle value when the data is ordered.