Measures of Center

Front

What is the median in a data set?

Back

The median is the middle value when the numbers are arranged in order. If there is an even number of values, the median is the average of the two middle numbers.

Front

How do you find the median of the following data set: 36, 42, 28, 52, 48, 36, 31?

Back

First, arrange the numbers in order: 28, 31, 36, 36, 42, 48, 52. The median is 36.

Front

Can a data set have more than one median?

Back

No, a data set can only have one median.

Front

What is the mode of a data set?

Back

The mode is the number that appears most frequently in a data set.

Front

In the data set 2, 2, 5, 6, 15, what is the relationship between mode and median?

Back

In this data set, the mode (2) is less than the median (6).

Front

How do you calculate the mean of a data set?

Back

To find the mean, add all the numbers together and divide by the total number of items.

Front

What is the mean of the data set: 2, 2, 5, 6, 15?

Back

Mean = (2 + 2 + 5 + 6 + 15) / 5 = 30 / 5 = 6.

Front

What is a dot plot?

Back

A dot plot is a simple way to display data using dots to represent the frequency of values.

Front

How do you create a dot plot from a data set?

Back

Count the frequency of each value in the data set and place dots above each corresponding value on a number line.

Front

What is the range of a data set?

Back

The range is the difference between the highest and lowest values in a data set.