IQR and MAD

Front

What does IQR stand for?

Back

Interquartile Range, which measures the spread of the middle 50% of a data set.

Front

How do you calculate the IQR?

Back

IQR = Q3 - Q1, where Q3 is the third quartile and Q1 is the first quartile.

Front

What is the purpose of calculating the Mean Absolute Deviation (MAD)?

Back

MAD measures the average distance between each data point and the mean, indicating variability.

Front

What is the first step in calculating the Mean Absolute Deviation?

Back

Find the Mean of the data.

Front

What is the second step in calculating the Mean Absolute Deviation?

Back

Subtract each data value from the mean, creating a new set of numbers.

Front

What is the third step in calculating the Mean Absolute Deviation?

Back

Find the mean of your new set of numbers.

Front

What is the formula for calculating the Mean Absolute Deviation?

Back

MAD = (Sum of Absolute Deviations) / (Number of Data Points).

Front

If the data set is 10, 9, 3, 8, 10, and the mean is 8, what is the first step to find the MAD?

Back

Subtract each data value from the mean (8) to find the absolute deviations.

Front

What is an absolute deviation?

Back

The absolute deviation is the absolute value of the difference between a data point and the mean.

Front

Calculate the Mean for the following test grades: 100, 80, 70, 90, 100.

Back

Mean = (100 + 80 + 70 + 90 + 100) / 5 = 88.