Standard Deviation

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

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

• 68%
• 95%
• 99.7%
• 50%

Which golfer is more likely to hit the ball 320 yards?

• Golfer A

• Golfer B

Which sales person is more likely to sell 6 cars in a month?

• Sales person A

• Sales person B

Both batters have the same average distance. Which one has a greater standard deviation?

• Batter A

• Batter B

• They have about the same standard deviation