FORESTRY
AGRICULTURAL STATISTICS AND ECONOMICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Construct a 95% confidence interval for the population mean, mu. Assume the population has a normal distribution. A sample of 25 randomly selected students has a mean test score of 81.5 with a standard deviation of 10.2
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(77.29, 85.71)
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(87.12, 98.32)
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(66.35, 69.89)
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(56.12, 78.34)
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Explanation:
Detailed explanation-1: -A 95% confidence interval for the mean was computed with a sample of size 90 to be (16, 22). Then the Error is ±3. Suppose data was collected with n = 36 to compute a 95% confidence interval. If the population standard deviation is 2400, then the Error is ±784.
Detailed explanation-2: -A 95% confidence interval is a range of values that you can be 95% certain contains the true mean of the population. This is not the same as a range that contains 95% of the values.
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