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4. The mean score on a standardized test is 540 with a standard deviation of 55....

4. The mean score on a standardized test is 540 with a standard deviation of 55. What percent of students taking the test scored above 625? (nearest hundredth)

5. True or False. A z-score is the number of standard deviations from the median.

6. True or False. A z-score cannot be negative.

7. True or False. If the standard deviation is small, the data values are very varied.

8. True or False.   The standard error of the mean is smaller than the standard deviation of the population.  

9. True or False.   The z a/2  value cannot be a negative number.

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