Standard Deviation and Spread

The ages of the employees at Company A tend to be closer together, than those at Company B.

• True

• False

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 the two batters each hit 10 balls, which batter probably hit the farthest ball and the shortest ball? 

• Batter A

• Batter B

• Both

• Neither

If a ball needs to be hit exactly 300 ft, which batter is more reliable to hit that distance?

• Batter A

• Batter B

• Both

• Neither

Which of the following is a measure of variability?

• mean

• median

• mode

• standard deviation

Which data set has the largest standard deviation?

• Set 1

• Set 2

• Set 3

• Set 4

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

What does this symbol represent?

• Standard Deviation

• Variance

• Mean Absolute Deviation

• Sigma

Order the dot plots from least to greatest standard deviation.

• A, D, C, B

• B, C, D, A

• A, D, B, C

• B, C, A, D

This data is normally distributed.  What percent of the data is in the shaded region?

• 68%

• 95%

• 99.7%

• 50%