Question: Use the data in Exercise 4 to construct a 95% confidence interval for the mean IQ score. Exercise 4 An IQ test was given to

Use the data in Exercise 4 to construct a 95% confidence interval for the mean IQ score.

Exercise 4

An IQ test was given to a simple random sample of 75 students at a certain college.

The sample mean score was 105.2. Scores on this test are known to have a standard deviation of σ = 10.

It is desired to construct a 90% confidence interval for the mean IQ score of students at this college.

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