Intro to Standard Deviation

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

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 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

Four data sets are shown below.
Set 1: {10, 19, 38, 50, 51}
Set 2: {5, 21, 26, 39, 51}
Set 3: {9, 38, 50, 50, 51}
Set 4: {5, 28, 28, 28, 51}
Which data set has the largest standard deviation?

• Set 1
• Set 2
• Set 3
• Set 4

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

What does this symbol represent?

• Standard Deviation
• Variance
• Mean Absolute Deviation
• Sigma

Find the median of these numbers:
4, 2, 7, 4, 3

• 2
• 5
• 7
• 4

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 7.5
• Test 2 with a standard deviation of 7.5
• Test 1 with a standard deviation of 5.6
• Test 2 with a standard deviation of 5.6

The table below shows the area of several states.
Delaware has an area of 2,000 square miles.  Which is true if Delaware is included in the data set?

• The mean increase
• The range decreases
• The interquartile range decreases
• The standard deviation increases

Find the range of these numbers:
15,2,3,7,8,4,3,2,16,2,4

• 2
• 13
• 14
• 7