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Statistics - Confidence Intervals for ACT Scores

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A sample of 64 statistics students at a small college had a mean mathematics ACT score of 28 with a standard deviation of 4. Estimate the mean mathematics ACT score for all statistics students at this college. Give the 95% confidence interval.

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This solution helps with a questions involving confidence intervals ad ACT scores in a sample of 64 students, where scores and standard deviation are given. Step by step calculations with explanations are included.

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Problem: A sample of 64 statistics students at a small college had a mean mathematics ACT score of 28 with a standard deviation of 4. Estimate the mean mathematics ACT score for all statistics students at this college. Give the 95 percent confidence interval.

Solution:

This is a 95 percent confidence interval for the population mean.

Note that we use the t ...

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