Standard Deviation Practice

What is the standard deviation for the data given:
5, 10, 7, 12, 0, 20, 15, 22, 8, 2

• 6.89
• 10.1
• 7.26
• 9

If a number is added to a set that is far away from the mean, how does this affect standard deviation?

• increase
• decrease
• stay the same
• both increase and decrease

If a number is added to the set that is in the middle of the data, how does this affect the range?

• increase
• decrease
• stay the same
• both increase and decrease

If 10 is added to every value in a set of data, what will happen to the value of the standard deviation?

• it will increase
• it will decrease
• it will stay the same
• it will both increase and decrease

Which of the following is a measure of dispersion?

• mean
• median
• mode
• standard deviation

What is the standard deviation for the data given: 5, 10, 7, 12, 0, 20, 15, 22, 8, 2

• 4.67

• 5.3

• 6.89

• 7.26

What is the standard deviation of the data set, correct to 2 decimal places?

• 21.39

• 21.4
• 21.38

• 23.1

The data sets show the test scores of a group for the last two tests.

Test 1: {75, 75, 85, 80, 65, 70, 65} Test 2: {95, 85, 85, 90, 90, 95, 100}

Which data set had the SMALLER standard deviation?

• Test 1 with a standard deviation of 6.9

• Test 2 with a standard deviation of 6.9

• Test 1 with a standard deviation of 5.2

• Test 2 with a standard deviation of 5.2

All of the below sets have the same mean.
Set 1-Standard Deviation=3.1
Set 2-Standard Deviation=4.9
Set 3-Standard Deviation=1.7
Set 4-Standard Deviation=3.2
Which set of data probably has the points closest to the mean?

• 1
• 2
• 3
• 4

What does this symbol represent?

• Standard Deviation
• Variance
• Mean Absolute Deviation
• Sigma