Standard Deviation

How many values are within one standard deviation of the mean?
180, 313, 101, 255, 202, 198, 109, 183, 181, 113, 171, 165, 318, 145, 131, 145, 226, 113, 268, 108

• 9

• 10

• 11

• 12

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

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

• 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 variance?

• it will increase

• it will decrease

• it will stay the same

• it will both increase and decrease

• A

• B

• C

• D

Answer explanation

• A

• B

• C

• D

Answer explanation

• A

• B

• C

• D

Answer explanation

• A

• B

• C

• D

Answer explanation

• A

• B

• C

• D

Answer explanation

What is the standard deviation for the data given:
{12, 13, 29, 18, 61, 35, 21}

• 293.67

• 15.87

• 17.14

• 41.98