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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.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 13PPS
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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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