Mean, Median, Mode, Range, IQR

Front

What is the mean?

Back

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

Front

How do you find the median?

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?

Back

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

Front

How do you calculate the range?

Back

The range is calculated by subtracting the minimum value from the maximum value in a data set.

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 a quartile?

Back

A quartile is a type of quantile that divides a data set into four equal parts, with Q1 being the first 25%, Q2 the median (50%), and Q3 the 75%.

Front

How do you find the first quartile (Q1)?

Back

Q1 is the median of the lower half of the data set (excluding the median if the number of data points is odd).

Front

How do you find the third quartile (Q3)?

Back

Q3 is the median of the upper half of the data set (excluding the median if the number of data points is odd).

Front

What does it mean if there is no mode?

Back

If there is no mode, it means that no number in the data set appears more than once.

Front

What is an example of calculating the mean?

Back

For the data set 2, 4, 6, the mean is (2 + 4 + 6) / 3 = 4.