Mean, Median, Mode, Range, Interquartile Range

Front

What is the mean of a data set?

Back

The mean is the average of a set of numbers, calculated by adding all the numbers together and dividing by the total count of numbers.

Front

How do you find the median of a data set?

Back

To find the median, arrange the numbers in order and identify the middle number. If there is an even number of values, the median is the average of the two middle numbers.

Front

What is the mode of a data set?

Back

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

Front

How do you calculate the range of a data set?

Back

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

Front

What is the interquartile range (IQR)?

Back

The IQR is the difference between the first quartile (Q1) and the third quartile (Q3) in a data set, representing the middle 50% of the data.

Front

What is Q1 in a data set?

Back

Q1, or the first quartile, is the median of the lower half of the data set, marking the 25th percentile.

Front

What is Q3 in a data set?

Back

Q3, or the third quartile, is the median of the upper half of the data set, marking the 75th percentile.

Front

If the data set is 1, 2, 3, 4, 5, what is the mean?

Back

The mean is (1 + 2 + 3 + 4 + 5) / 5 = 3.

Front

If the data set is 10, 20, 20, 30, what is the mode?

Back

The mode is 20, as it appears most frequently.

Front

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

Back

The range is 20 - 5 = 15.