Test on Measure of Variability

Find the mean of these numbers:
5,11,2,12,4,2

• 4.1
• 6
• 4.5
• 4

Identify the outlier for the given data?
23, 34, 27, 7, 30, 26, 28, 31, 34

• 7
• 23
• 31
• 34

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

• Find the distance each value is from the mean
• Find the mean of the distances
• Find the mean of the data

Find the Mean Absolute Deviation:  5, 11, 2, 7, 16.  The Mean is 8.2 

• 3.2
• 2.8
• 1.2
• 4.2

Which mean absolute deviation would have a greater variability or spread?  4.2 or 8.5?

• 4.2
• 8.5

What is the range?

• 6

• 2 - 8

• 3

• 4

What is the range?

• 27

• 12

• 25

• 13 - 40

Find the Standard Deviation

{ 12, 15, 16, 12,}

• 4

• 4.09

• 5.6

• 3.6

Roger bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is the range of Roger's scores?

• 193
• 127
• 60
• 66

Describe how to find the mean of a data set.

• Multiply the numbers and divide by how many numbers there are.
• Add all the numbers together.
• Add all the numbers together and divide by how many numbers are in the data set.
• Subtract the Smallest number from the Largest Number