Mean, Median, Mode, MAD, and 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 ascending 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 mode?

Back

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

Front

Define Mean Absolute Deviation (MAD).

Back

MAD is a measure of the average distance between each data point and the mean of the data set.

Front

What is Interquartile Range (IQR)?

Back

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

Front

Calculate the mean of: 3, 2, 1, 3, 2, 1, 3, 2, 1, 3, 2, 1.

Back

Mean = 2.

Front

Calculate the mean of: 2, 8, 6, 3, 12, 7, 4.

Back

Mean = 6.

Front

Find the median of: 23, 37, 11, 58, 13, 45.

Back

Median = 30.

Front

Find the median, first quartile, third quartile, and IQR of: 203, 183, 212, 181, 157, 204, 189, 190.

Back

Median: 189.5, First Quartile: 182, Third Quartile: 203.5, IQR: 21.5.

Front

What is the first quartile (Q1)?

Back

Q1 is the median of the lower half of a data set, representing the 25th percentile.