Sample Standard Deviations

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

• 4.1
• 6
• 4.5
• 4

Tags

CCSS.7.NS.A.3

What is the standard deviation for the data given? (Round to the nearest hundredth.)

{12, 13, 29, 18, 61, 35, 21}

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

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

• 511.33

• 22.61

• 438.48

• 20.94

Two data sets are shown below.

Set 1: {10, 19, 38, 50, 51}

Set 2: {5, 28, 28, 28, 51}

Which data set has the largest standard deviation?

• Set 1

• Set 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

Jeff has four grades from tests and IXL. They are all weighted equally. If Jeff's grades are 100, 96, 96, and 100, what Jeff's current average grade?

• 96

• 97

• 98

• 100

Tags

CCSS.6.NS.B.3

What is the standard deviation of the data?

• 0.01 g

• 1.00 g

• 1.06 g

• 10.5 g