A regression was run to determine if there is a relationship between the happiness index (y) and life expectancy in years of a given country (x). The results of the regression were: y^=a+bx ; a=-0.423 , b=0.07 a. Write the equation of the Least Squares Regression line. b. Find the value for the correlation coefficient, r? c. If a country increases its life expectancy, the happiness index will Increase or decrease ( circle one) d. If the life expectancy is increased by 1 year in a certain country, how much will the happiness index change? Round to two decimal places. e. Use the regression line to predict the happiness index of a country with a life expectancy of 85 years. Round to two decimal places.-

A regression was run to determine if there is a relationship between the happiness index (y) and life expectancy in years of a given country (x). The results of the regression were: y^=a+bx ; a=-0.423 , b=0.07 a. Write the equation of the Least Squares Regression line. b. Find the value for the correlation coefficient, r? c. If a country increases its life expectancy, the happiness index will Increase or decrease ( circle one) d. If the life expectancy is increased by 1 year in a certain country, how much will the happiness index change? Round to two decimal places. e. Use the regression line to predict the happiness index of a country with a life expectancy of 85 years. Round to two decimal places.-

Trigonometry (MindTap Course List)

8th Edition

ISBN:9781305652224

Author:Charles P. McKeague, Mark D. Turner

Publisher:Charles P. McKeague, Mark D. Turner

Chapter4: Graphing And Inverse Functions

Section: Chapter Questions

Problem 6GP: If your graphing calculator is capable of computing a least-squares sinusoidal regression model, use...

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