anonymous1813
20.11.2020 •
Mathematics
Use the confidence level and sample data to find a confidence interval for estimating the population μ. Round your answer to the same number of decimal places as the sample mean.
A group of 66 randomly selected students have a mean score of 22.4 with a standard deviation of 2.8 on a placement test. What is the 90% confidence interval for the mean score, μ, of all students taking the test?
21.6 < μ < 23.2
21.7 < μ < 23.1
21.5 < μ < 23.3
21.8 < μ < 23.0
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Ответ:
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Step-by-step explanation:
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