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The poverty rates for white and blacks in the U.S were compared for a period of twelve years with the following results. White 9.1 9.7 9.6 8.8 8 6.9 6.9 7 7.1 7.7 6.8 7 Black 30.9 32.4 33 30.8 28.9 27.8 27.5 28.2 27.9 27.1 26.9 27.8 a. Treat poverty rate for whites as the independent variable. Determine the sample correlation coefficient. What does this say about the direction of the relationship and what does that mean? b. Determine the least squares line for these data. c. What is the slope of the least squares line and what does it mean in this situation? d. If the poverty rate for whites is 7.5, what would you expect the poverty rate for blacks would be? e. If the poverty rate for blacks is 30, what would you expect the poverty rate for whites would be? g Explain why it may not be appropriate to predict the black poverty rate when the white poverty rate is 12.

The poverty rates for white and blacks in the U.S were compared for a period of twelve years with the following results. White 9.1 9.7 9.6 8.8 8 6.9 6.9 7 7.1 7.7 6.8 7 Black 30.9 32.4 33 30.8 28.9 27.8 27.5 28.2 27.9 27.1 26.9 27.8 a. Treat poverty rate for whites as the independent variable. Determine the sample correlation coefficient. What does this say about the direction of the relationship and what does that mean? b. Determine the least squares line for these data. c. What is the slope of the least squares line and what does it mean in this situation? d. If the poverty rate for whites is 7.5, what would you expect the poverty rate for blacks would be? e. If the poverty rate for blacks is 30, what would you expect the poverty rate for whites would be? g Explain why it may not be appropriate to predict the black poverty rate when the white poverty rate is 12.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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The poverty rates for white and blacks in the U.S were compared for a period of twelve years with the following results. White 9.1 9.7 9.6 8.8 8 6.9 6.9 7 7.1 7.7 6.8 7 Black 30.9 32.4 33 30.8 28.9 27.8 27.5 28.2 27.9 27.1 26.9 27.8 a. Treat poverty rate for whites as the independent variable. Determine the sample correlation coefficient. What does this say about the direction of the relationship and what does that mean? b. Determine the least squares line for these data. c. What is the slope of the least squares line and what does it mean in this situation? d. If the poverty rate for whites is 7.5, what would you expect the poverty rate for blacks would be? e. If the poverty rate for blacks is 30, what would you expect the poverty rate for whites would be? g Explain why it may not be appropriate to predict the black poverty rate when the white poverty rate is 12.
Transcribed Image Text:The poverty rates for white and blacks in the U.S were compared for a period of twelve years with the following results. White 9.1 9.7 9.6 8.8 8 6.9 6.9 7 7.1 7.7 6.8 7 Black 30.9 32.4 33 30.8 28.9 27.8 27.5 28.2 27.9 27.1 26.9 27.8 a. Treat poverty rate for whites as the independent variable. Determine the sample correlation coefficient. What does this say about the direction of the relationship and what does that mean? b. Determine the least squares line for these data. c. What is the slope of the least squares line and what does it mean in this situation? d. If the poverty rate for whites is 7.5, what would you expect the poverty rate for blacks would be? e. If the poverty rate for blacks is 30, what would you expect the poverty rate for whites would be? g Explain why it may not be appropriate to predict the black poverty rate when the white poverty rate is 12.
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