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4. Assume the graduate GRE test scores have a normal distribution with a mean of 1100 and a standard deviation of 120 (8pts). 1) What

4. Assume the graduate GRE test scores have a normal distribution with a mean of 1100 and a standard deviation of 120 (8pts). 1) What is the z score for a raw score of 1280?

2) What is the z score for a raw score of 980?

3) What proportion of the GRE test scores are above 1280?

4) What proportion of the GRE test scores are below 980?

5) What proportion of the GRE test scores are between 980 and 1280?

6) What is the probability that you would find a GRE score of 880 or below?

7) What is the probability that you would find a GRE score of 1480 or above?

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