A person got a score of 4.78 on a test, which turned out to be a...
A person got a score of 4.78 on a test, which turned out to be a Z score of +1.5. What percentage of cases are above this score? (Assume a normal distribution.)
1. 100% - 43.32% = 56.68%
2. 43.32% - 50% = -6.68%
3. 50% + 43.32% = 83.32%
4. 50% - 43.32% = 6.68%
Homework Answers
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4. The famous IQ test is designed to have a normal distribution, a population mean score of 100, and the population standard deviation of 15. If we choose one person at random, what is the probability that this person will have the IQ above 115?
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