Mean, Median, Mode, Range, & Quartiles

Front

What is the mean of a data set?

Back

The mean is the average of a data set, calculated by adding all the numbers together and dividing by the number of items.

Front

What is the mode?

Back

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

Front

What is the median?

Back

The median is the middle number in a data set when the numbers are arranged in order.

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.

Front

What do quartiles represent?

Back

Quartiles divide a data set into four equal parts, showing how data is spread.

Front

How do you find the mean of these numbers: 2, 57, 38, 42, 6?

Back

Add the numbers (2 + 57 + 38 + 42 + 6 = 145) and divide by the number of items (5). Mean = 145 / 5 = 29.

Front

What do points A and E represent on a box plot?

Back

Points A and E represent the least and greatest values in the data set.

Front

If the mode of a test score is 92, what does that mean?

Back

It means that more students scored 92 than any other score.

Front

How do you calculate the range of the numbers 5, 10, 15, 20?

Back

Range = Highest value - Lowest value = 20 - 5 = 15.

Front

What is the first quartile (Q1)?

Back

The first quartile (Q1) is the median of the lower half of the data set.