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Part 1: The following numbers below represent heights (in feet) of 3-year old elm trees: 5.1,...

Part 1: The following numbers below represent heights (in feet) of 3-year old elm trees: 5.1, 5.8, 6.1, 6.2, 6.4, 6.7, 6.8, 6.9, 7.0, 7.2, 7.3, 7.3, 7.4, 7.5, 8.1, 8.1, 8.2, 8.3, 8.5, 8.6, 8.6, 8.7, 8.7, 8.9, 8.9, 9.0, 9.1, 9.3, 9.4. Assuming that the heights of 3-year old elm trees are normally distributed, find a (two-sided) 90% confidence interval for the mean height of 3-year old elm trees.

Part 2:Assuming that the heights of 3-year old elm trees are normally distributed, use the data in the previous problem to test whether the average height of 3-year old elm trees is greater than 7.5 feet, at significance level 0.05. Also, what is the p-value of the test?

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milcah answered 5 months ago
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