Mean, Mode, Median, Range, and IQR

Front

What is the mean of a dataset?

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 mode of a dataset?

Back

The mode is the number that appears most frequently in a dataset. A dataset may have one mode, more than one mode, or no mode at all.

Front

What is the median of a dataset?

Back

The median is the middle value when a dataset is ordered from least to greatest. If there is an even number of observations, the median is the average of the two middle numbers.

Front

How is the range of a dataset calculated?

Back

The range is calculated by subtracting the smallest value in the dataset from the largest value.

Front

What does IQR stand for and how is it calculated?

Back

IQR stands for Interquartile Range. It is calculated by subtracting the first quartile (Q1) from the third quartile (Q3) in a dataset.

Front

What is the first quartile (Q1)?

Back

The first quartile (Q1) is the median of the lower half of a dataset, representing the 25th percentile.

Front

What is the third quartile (Q3)?

Back

The third quartile (Q3) is the median of the upper half of a dataset, representing the 75th percentile.

Front

If a dataset has values 2, 2, 4, 6, 6, 6, 8, 8, what is the mode?

Back

The mode is 6, as it appears most frequently.

Front

Given the dataset 10, 15, 20, 25, 30, what is the median?

Back

The median is 20, as it is the middle value of the ordered dataset.

Front

Calculate the range of the dataset: 4, 7, 9, 12, 15.

Back

The range is 15 - 4 = 11.