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An analyst believe that the only significant determinant of banks' return on assets (Y) is the ratio of loans to deposits (X). For a random sample of banks the sample regression line
Yhat = 0.97 + 0.57X
1.72 2.04 T statistics
was obtained with the coefficient of determination 0.720.
a. Find the sample correlation between returns on assets and the ratio of loans to deposits.
b. Interpret the intercept and slope of the estimated regression line.
c. Interpret the coefficient of determination
d. Test the null hypothesis that the slope of the population regression line is 0 against the alternative that the true slope is not equal to zero, and interpret your results.
A drug company is considering marketing a new local anesthetic. The effective time of the anesthetic the company is currently producing has a normal distribution with an average of 7.5 minutes and a standard deviation of 1.2 minutes.
How large a sample is required if the 97 percent level of confidence is used and the estimate is to be within $2,500? The standard deviation is $16,000.
A video rental store has two video cameras available for customers to rent. Historically, demand for cameras has followed this distribution:
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In the design of the robot to insert the small cylindrical part into a close-fitting circular hole, the robot arm must exert a 90-n force p on the part parallel to the axis of the hole as shown. Determine the components of the force which the part..
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The superintendent of a printing plant has selected a random sample of 100 rolls of paper from a large shipment. The average length of the sample rolls is 416 feet, with a variance of 2704 feet.
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Write ten-step study plan with suitable example that will permit you to analyze your data.
Four percent of DVD players manufactured by an electronics company are defective. Suppose six DVD players are randomly selected from the production line. Each DVD player is determined to be defective or non-defective.
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