STAT.F/BUS.+ECO.PKG.:LOOSELEAF+MYLABSPL
13th Edition
ISBN: 9780135412428
Author: MCCLAVE
Publisher: PEARSON C
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Chapter 11, Problem 11.115ACI
Evaluating a truck weigh-in-motion program. The Minnesota Department of Transportation installed a state-of-the-art weigh-in-motion scale in the concrete surface of the eastbound lanes of Interstate 494 in Bloomington, Minnesota. After installation. a study was undertaken to determine whether the scale’s readings correspond to the static weights of the vehicles being monitored. (Studies of this type are known as calibration studies.) After some preliminary comparisons using a two-axle, six-tire truck carrying different loads (see the accompanying table), calibration adjustments were made in the software of the weigh-in-motion system, and the scales were reevaluated.
- a. Construct two
scatterplots . one of y1 versus x and the other of y2 versus x. - b. Use the scatterplots of part a to evaluate the performance of the weigh-in-motion scale both before and after the calibration adjustment.
- c. Calculate the
correlation coefficient for both sets of data and Interpret their values. Explain how these correlation coefficients can be used to evaluate the weigh-in-motion scale. - d. Suppose the sample correlation coefficient for y1 and x was 1. Could this happen if the static weights and the weigh-in-motion readings disagreed? Explain.
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Chapter 11 Solutions
STAT.F/BUS.+ECO.PKG.:LOOSELEAF+MYLABSPL
Ch. 11.1 - In each case, graph the line that passes through...Ch. 11.1 - Give the slope and y-intercept for each of the...Ch. 11.1 - The equation for a straight line (deterministic...Ch. 11.1 - Refer to Exercise 11.3. Find the equations of the...Ch. 11.1 - Plot the following lines: a. y 4 + x b. y = 5 2x...Ch. 11.1 - Give the slope and y-intercept for each of the...Ch. 11.1 - Prob. 11.7LMCh. 11.1 - Prob. 11.8LMCh. 11.1 - If a straight-line probabilistic relationship...Ch. 11.1 - Congress voting on women's issues. The American...
Ch. 11.1 - Best-paid CEOs. Refer to Glassdoor Economic...Ch. 11.1 - Estimating repair and replacement costs of water...Ch. 11.1 - Forecasting movie revenues with Twitter. A study...Ch. 11.2 - The following table is similar to Table 11.2.It is...Ch. 11.2 - Refer to Exercise 11.14. After the least squares...Ch. 11.2 - Construct a scatterplot for the data in the...Ch. 11.2 - Consider the following pairs of measurements: a....Ch. 11.2 - Use the applet Regression by Eye to explore the...Ch. 11.2 - In business, do nice guys finish first or last?...Ch. 11.2 - State Math SAT scores. Refer to the data on...Ch. 11.2 - Lobster fishing study. Refer to the Bulletin of...Ch. 11.2 - Repair and replacement costs of water pipes. Refer...Ch. 11.2 - Joint Strike Fighter program. The Joint Strike...Ch. 11.2 - Software millionaires and birthdays. In Outliers:...Ch. 11.2 - Prob. 11.24ACICh. 11.2 - Ranking driving performance of professional...Ch. 11.2 - Sweetness of orange juice. 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