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A plant distills liquid air to produce oxygen and nitrogen. The purity of the oxygen (expressed as a percentage) is believed to be linearly associated with the amount of impurity in the liquid air (expressed in parts per million, ppm). Data from many samples was analyzed and the least-squares regression line was found to be Purity (%)=96.8-3.1Count(ppm). Which interpretation of the slope of the least squares regression line is correct? (1) When Count increases by 1ppm, the mean of Purity will increase by 3.1%. (II) When Count increases by 3.1ppm, the mean of Purity will decrease by 1%. (III) When Purity decreases by 3.1%, the mean of Count will increase by 1ppm. (IV) When Count increases by 1ppm, the mean of Purity will decrease by 3.1%. O (IV) O (1) O (III) O (II)

A plant distills liquid air to produce oxygen and nitrogen. The purity of the oxygen (expressed as a percentage) is believed to be linearly associated with the amount of impurity in the liquid air (expressed in parts per million, ppm). Data from many samples was analyzed and the least-squares regression line was found to be Purity (%)=96.8-3.1Count(ppm). Which interpretation of the slope of the least squares regression line is correct? (1) When Count increases by 1ppm, the mean of Purity will increase by 3.1%. (II) When Count increases by 3.1ppm, the mean of Purity will decrease by 1%. (III) When Purity decreases by 3.1%, the mean of Count will increase by 1ppm. (IV) When Count increases by 1ppm, the mean of Purity will decrease by 3.1%. O (IV) O (1) O (III) O (II)

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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A plant distills liquid air to produce oxygen and nitrogen. The purity of the oxygen (expressed as a percentage) is believed to be linearly associated with the amount of impurity in the liquid air (expressed in parts per million, ppm). Data from many samples was analyzed and the least-squares regression line was found to be Purity (%)=96.8-3.1Count(ppm). Which interpretation of the slope of the least squares regression line is correct? (1) When Count increases by 1ppm, the mean of Purity will increase by 3.1%. (II) When Count increases by 3.1ppm, the mean of Purity will decrease by 1%. (III) When Purity decreases by 3.1%, the mean of Count will increase by 1ppm. (IV) When Count increases by 1ppm, the mean of Purity will decrease by 3.1%. O (IV) O (1) O (III) O (II)
Transcribed Image Text:A plant distills liquid air to produce oxygen and nitrogen. The purity of the oxygen (expressed as a percentage) is believed to be linearly associated with the amount of impurity in the liquid air (expressed in parts per million, ppm). Data from many samples was analyzed and the least-squares regression line was found to be Purity (%)=96.8-3.1Count(ppm). Which interpretation of the slope of the least squares regression line is correct? (1) When Count increases by 1ppm, the mean of Purity will increase by 3.1%. (II) When Count increases by 3.1ppm, the mean of Purity will decrease by 1%. (III) When Purity decreases by 3.1%, the mean of Count will increase by 1ppm. (IV) When Count increases by 1ppm, the mean of Purity will decrease by 3.1%. O (IV) O (1) O (III) O (II)
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