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What is the slope of the least-squares regression line for these data? Carry your intermediate computations to at least four decimal places and round your answer to at least two decimal places. (If necessary, consult a list of formulas.)

What is the slope of the least-squares regression line for these data? Carry your intermediate computations to at least four decimal places and round your answer to at least two decimal places. (If necessary, consult a list of formulas.)

Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015
Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015
1st Edition
ISBN:9781680331141
Author:HOUGHTON MIFFLIN HARCOURT
Publisher:HOUGHTON MIFFLIN HARCOURT
Chapter9: Solving Quadratic Functions
Section: Chapter Questions
Problem 4CA
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Below a. ariate data giving birthrate and life expectancy information for each of twelve countries. For each of the countries, both the number of births x per Españo one thousand people in the population and the female life expectancy y (in years) are given. These data are displayed in the Figure 1 scatter plot. Also given is the product of the birthrate and the female life expectancy for each of the twelve countries. (These products, written in the column labelled "xy", may aid in calculations.) Birthrate, x Female life (number of births per 1000 pop.) expectancy, y (in years) ху 18.7 72.2 1350.14 85 14.7 76.2 1120.14 80- 75- 47.6 63.4 3017.84 An 70+ 36.3 66.0 2395.8 65- 52.9 59.0 3121.1 60- 47.9 56.8 2720.72 55+ 31.1 62.9 1956.19 50- 50.1 54.0 2705.4 10 15 20 25 30 35 40 45 50 55 6o 40.8 64.7 2639.76 Birthrate 26.5 71.8 1902.7 (number of births per 1000 pop.) 24.8 73.0 1810.4 Figure 1 Female life expectancy (In years) X x
Transcribed Image Text:Below a. ariate data giving birthrate and life expectancy information for each of twelve countries. For each of the countries, both the number of births x per Españo one thousand people in the population and the female life expectancy y (in years) are given. These data are displayed in the Figure 1 scatter plot. Also given is the product of the birthrate and the female life expectancy for each of the twelve countries. (These products, written in the column labelled "xy", may aid in calculations.) Birthrate, x Female life (number of births per 1000 pop.) expectancy, y (in years) ху 18.7 72.2 1350.14 85 14.7 76.2 1120.14 80- 75- 47.6 63.4 3017.84 An 70+ 36.3 66.0 2395.8 65- 52.9 59.0 3121.1 60- 47.9 56.8 2720.72 55+ 31.1 62.9 1956.19 50- 50.1 54.0 2705.4 10 15 20 25 30 35 40 45 50 55 6o 40.8 64.7 2639.76 Birthrate 26.5 71.8 1902.7 (number of births per 1000 pop.) 24.8 73.0 1810.4 Figure 1 Female life expectancy (In years) X x
75+ 47.6 63.4 3017.84 70- 36.3 66.0 2395.8 65- 52.9 59.0 3121.1 60 47.9 56.8 2720.72 55- 31.1 62.9 1956.19 50. 50.1 54.0 2705.4 10 15 20 25 30 35 40 45 50 55 60 40.8 64.7 2639.76 Birthrate 26.5 71.8 1902.7 (number of births per 1000 pop.) 24.8 73.0 1810.4 Figure 1 14.0 73.4 1027.6 Send data to calculator Send data to Excel What is the slope of the least-squares regression line for these data? Carry your intermediate computations to at least four decimal places and round your answer to at least two decimal places. (If necessary, consult a list of formulas.) Female Iife expectar (In years)
Transcribed Image Text:75+ 47.6 63.4 3017.84 70- 36.3 66.0 2395.8 65- 52.9 59.0 3121.1 60 47.9 56.8 2720.72 55- 31.1 62.9 1956.19 50. 50.1 54.0 2705.4 10 15 20 25 30 35 40 45 50 55 60 40.8 64.7 2639.76 Birthrate 26.5 71.8 1902.7 (number of births per 1000 pop.) 24.8 73.0 1810.4 Figure 1 14.0 73.4 1027.6 Send data to calculator Send data to Excel What is the slope of the least-squares regression line for these data? Carry your intermediate computations to at least four decimal places and round your answer to at least two decimal places. (If necessary, consult a list of formulas.) Female Iife expectar (In years)
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