Name: __________________________________________________

**Assume that you are working with the standardized normal curve and that you need to calculate z-scores & percentages. Keep record of your work!

1. What percentage of cases falls between the z scores of +.75 and -.75 in the population?

1. Professor Smith administers a survey to a group of inmates that is believed to measure antisocial attitudes. The average score on the antisocial attitude index is 100 with a standard deviation of 25.
   1. What percentage of inmates have a score lower than 50?

1. If the survey is valid, we would expect to find that only 5% of individuals score above a score of ____________ on the index.