1. What z-score represents the following percentiles?
a. P85
b. P40

2. What percentile does the following z-scores represent?
a. z=2.67
b. z= -0.5

3. In a science test, the mean score is 42 and the standard deviation is 5. Assuming the scores are normally distributed, what percent of the score is

a. greater than 48?

b. less than 50?

c. between 30 and 49?



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