Finding Variance and 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

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

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

• 47.47
• 102.01
• 52.77
• 81

Which of the following is a measure of variability?

• mean
• median
• mode
• standard deviation

Which of the following is a measure of central tendency?

• Range
• Standard Deviation
• Variance
• Mean

What is the variance of the data set?

• 72
• 21.4
• 533.67
• 395.7

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

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

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

Determine the mean absolute deviation of the data. 9, 7, 11, 10, and 8

• 9
• 1.42
• 1.2
• 1.15