Understanding Mean Absolute Deviation

The video tutorial explains how to determine variability in the heights of Jake's and Jen's friends using the Mean Absolute Deviation (MAD). It covers calculating the mean height for each group, followed by the MAD calculation. The tutorial concludes that Jen's friends have higher variability in their heights compared to Jake's friends.

What does MAD stand for in the context of data analysis?

• Mean Average Deviation

• Mean Absolute Deviation

• Median Absolute Difference

• Median Average Difference

What is the first step in calculating MAD?

• Find the range of the data set

• Find the mode of the data set

• Find the mean of the data set

• Find the median of the data set

How do you calculate the mean of a data set?

• Multiply all numbers and divide by the number of data points

• Add all numbers and multiply by the number of data points

• Add all numbers and divide by the number of data points

• Subtract all numbers and divide by the number of data points

What is the mean height of Jake's friends?

• 54

• 56

• 50

• 52

What is the total sum of heights for Jake's friends?

• 400

• 416

• 432

• 448

How is the Mean Absolute Deviation (MAD) calculated?

• By finding the sum of the squared differences from the mean

• By finding the average of the squared differences from the mean

• By finding the sum of the absolute differences from the mean

• By finding the average of the absolute differences from the mean

What is the MAD for Jake's friends?

• 2.0

• 2.5

• 3.0

• 3.5

How many data points are there for Jen's friends?

• 7

• 6

• 8

• 9

What is the mean height of Jen's friends?

• 54.4

• 53.4

• 52.4

• 55.4

What is the total sum of heights for Jen's friends?

• 364

• 394

• 374

• 384