Explanation Procedure used: “To graph a linear equation in the form y = m x + b using the slope-intercept method: 1. Locate the y -intercept on the y -axis. 2 Using the slope in fractional form, determine the amount of vertical and horizontal movement indicated. 3. From the y-intercept, locate additional points on the graph of the equation by counting the indicated vertical and horizontal movements of the slope. 4. Draw the line connecting the points and extending beyond the points.” Calculation: Rewrite the given function as x − y = 4 . x − y = 4 − y = − x + 4 y = x − 4 Compare the given equation y = x − 4 with y = m x + b and obtain the value of m and b . y = m ↓ x + b ↓ y = 1 x − 4 The coefficient of x is observed to be 1 . Thus, the slope of the equation is 1 1 or − 1 − 1 . Similarly, the value of b is − 4 , so the y -coordinate of y -intercept is − 4 . Thus, the y -intercept is ( 0 , − 4 ) . Now obtain the additional points as follows

MML F/COLLEGE MAT F/TRADES - ACCESS CODE

10th Edition

ISBN: 9781323845967

Author: Hobbs

Publisher: PEARSON

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Chapter 9, Problem 43RE

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4. (5 pts) Conduct a chi-square contingency test (test of independence) to assess whether there is an association between the behavior of the elderly person (did not stop to talk, did stop to talk) and their likelihood of falling. Below, please state your null and alternative hypotheses, calculate your expected values and write them in the table, compute the test statistic, test the null by comparing your test statistic to the critical value in Table A (p. 713-714) of your textbook and/or estimating the P-value, and provide your conclusions in written form. Make sure to show your work. Did not stop walking to talk Stopped walking to talk Suffered a fall 12 11 Totals 23 Did not suffer a fall | 2 Totals 35 37 14 46 60 T

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Name: Lab Time: Quiz 7 & 8 (Take Home) - due Wednesday, Feb. 26 Contingency Analysis (Ch. 9) In lab 5, part 3, you will create a mosaic plot and conducted a chi-square contingency test to evaluate whether elderly patients who did not stop walking to talk (vs. those who did stop) were more likely to suffer a fall in the next six months. I have tabulated the data below. Answer the questions below. Please show your calculations on this or a separate sheet. Did not stop walking to talk Stopped walking to talk Totals Suffered a fall Did not suffer a fall Totals 12 11 23 2 35 37 14 14 46 60 Quiz 7: 1. (2 pts) Compute the odds of falling for each group. Compute the odds ratio for those who did not stop walking vs. those who did stop walking. Interpret your result verbally.

Chapter 9 Solutions

MML F/COLLEGE MAT F/TRADES - ACCESS CODE

Ch. 9.1 - Find y if x = 4 in the equation 3x + 2y = 6. Ch. 9.1 - Locate the points in Fig. 9–12 by giving the...Ch. 9.1 - Prob. 2E Ch. 9.1 - Prob. 3E Ch. 9.1 - Prob. 4E Ch. 9.1 - Prob. 5E Ch. 9.1 - Prob. 6E Ch. 9.1 - Prob. 7E Ch. 9.1 - Prob. 8E Ch. 9.1 - Prob. 9E

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The graph of the equation x − y = 4 using slope-intercept procedure.

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