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(Solved): 6- Twelve randomly selected mature citrus trees of one variety have a mean height of 13.8 feet with ...



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6- Twelve randomly selected mature citrus trees of one variety have a mean height of 13.8 feet with a standard deviation of 1.2 feet, and 15 randomly selected mature citrus trees of another variety have a mean height of 12.9 feet with a standard deviation of 1.5 feet. Assuming that the random samples were selected from normal populations with equal variances; a. Construct a confidence interval for the difference between the true average heights of the two kinds of circus trees. b. Construct a confidence interval for the ratio of the variances of the two populations sampled.


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