# Group Exercise: Standard Scores

Calculate the standard score (Z) and determine the probability for the following conditions. The mean hourly wage for New Yorkers with a college degree is $18.25. The population standard deviation is $11.80. Each group will demonstrate their work on the whiteboard.

You can compute the area under the normal curve here: http://www.stat.berkeley.edu/~stark/SticiGui/Text/clt.htm#normal_curve

1. What is the probability of drawing a person at random whose wage is below $15?

2. What is the probability of drawing a person at random whose wage is above $25?

3. What is the probability of drawing a person at random whose wage is between $19 and $23?

4. What is the probability of drawing a person at random whose wage is between $14 and $18?

5. What is the probability of drawing a person at random whose wage is between $20 and $22?

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