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8. How smart are you really? An online IQ test is claiming that it can estimate...

8. How smart are you really? An online IQ test is claiming that it can estimate your IQ accurately.
You decide to take the test 25 times in a row. From your 100 tests, you get an average IQ of 105
with a sample standard deviation of 20. You know that the true average IQ score is 100. Based on
your sample, test the claim that the average IQ for people is more than 100. Use a 0.01 level.

Math   Statistics-And-Probability   
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