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Cherry trees. Timber yield is approximately equal to the volume of a tree, however, this value is difficult to measure without first cutting the tree down. Instead, other variables, such as height and diameter, may be used to predict a tree's volume and yield. Researchers wanting to understand the relationship between these variables for black cherry trees collected data from 31 such trees in the Allegheny National Forest, Pennsylvania. Height is measured in feet, diameter in inches (at 54 inches above ground), and volume in cubic feet.
(a) Calculate a 95% confidence interval for the coefficient of height, and interpret it in the context of the data.
(b) One tree in this sample is 79 feet tall, has a diameter of 11.3 inches, and is 24.2 cubic feet in volume. Determine if the model overestimates or underestimates the volume of this tree, and by how much.
STAFFING Student Painters, which specializes in painting the exterior of residential buildings, has five people available to be organized into two-person.
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In each of the given questions, complete the given series
In order to receive the annual bonus, employees are only allowed to miss 9 days of work each year. Sam missed two days each quarter.
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A Pyramid is 685 ft high (due to erosion, its current height is slightly less) and has a square base of side 1370 ft. Find the work needed to build the pyramid if the density of the stone is estimated at 120 lb/ft^3.
Analyse the reasons why the assessment of service quality can be conceptually and practically much more difficult than the measurement of quality
Building A is 170 feet shorter than Building B. The total height of the two buildings is 1500 feet. Find the height of each building.
(a) What proportion of pregnancies lasts more than 283 days? (b) What proportion of pregnancies lasts between 238 and 278 days?
Let A and B n x n matrices of real numbers. Expand (A+B) (A-B). Use, basic matrix laws - matrices is (A+B)(A-B) = A2 - B2
A poster is to have an area of 240 in^2 with 1 in margins at the bottom and sides and a 2 in margin at the top. What dimensions will give the larges printed area?
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