Standard Deviation

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

Tags

CCSS.HSS.ID.A.3

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

Tags

CCSS.HSS.ID.A.4

The standard deviation for 4 data sets are shown.  Which has all of the data points the same as the mean?
A          4.3
 B           2.7
C             0
D            6

• A
• B
• C
• D

Which of the following is a measure of variability?

• mean
• median
• mode
• standard deviation

Tags

CCSS.HSS.ID.A.2

CCSS.HSS.ID.A.3

CCSS.HSS.ID.A.4

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

Tags

CCSS.HSS.ID.A.2

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

Tags

CCSS.6.SP.A.3

CCSS.6.SP.B.5

If a bowler needs to hit exactly 6 pins, which bowler is more reliable to hit that number?

• Bowler A
• Bowler B
• Both
• Neither

If a number is added to a set that is bigger than the mean. How does this affect the mean?

• increase
• decrease
• stay the same

If a number is added to a set that is the same as the mean, how does this affect the mean?

• increase
• decrease
• stay the same

If a number is added to a set that is smaller than the mean. How does this affect the mean?

• increase
• decrease
• stay the same