Mean score of a college entrance test
The mean score of a college entrance test is 500; the standard deviation is 75. The scores are normally distributed. What percent of the students scored below 320?
About 50.82%
About 34.13%
About 7.86%
About 0.82%
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What is the area under the normal curve between z = -1.0 and z = -2.0?
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