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Asked Dec 12, 2019
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We take a random sample of 25 scores from a biology exam and the sample mean is 80 ( the population scores are normally distributed) the known standard deviation=12. What is the upper confidence limit at 90 % CI?

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From the given information, there are 25 scores, the population standard deviation of 12 and the sample mean is 80. The confidence ...

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MathStatistics

Hypothesis Testing

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