A regression was run to determine if there is a relationship between the happillessexy all theexpectancy in years of a given country (x).The results of the regression were:=a+bxa=-0.887b=0.055(a) Write the equation of the Least Squares Regression line of the form(b) Which is a possible value for the correlation coefficient, r?00.749O-1.4301.43-0.749(c) If a country increases its life expectancy, the happiness index willincreasedecrease (d) If the life expectancy is increased by 0.5 years in a certain country, how much will the happiness indexchange? Round to two decimal places.(e) Use the regression line to predict the happiness index of a country with a life expectancy of 79 years.Round to two decimal places.questions inBrandBrandon's iP

Answered: pectancy in years of a given country…

pectancy in years of a given country (x). e results of the regression were: y=a+bx a=-0.887 b-0.055 a) Write the equation of the Least Squares Regression line of the form +

College Algebra

1st Edition

ISBN:9781938168383

Author:Jay Abramson

Publisher:Jay Abramson

Chapter6: Exponential And Logarithmic Functions

Section6.8: Fitting Exponential Models To Data

Problem 1TI: Table 2 shows a recent graduate’s credit card balance each month after graduation. a. Use...

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Question

A regression was run to determine if there is a relationship between the happillessexy all the
expectancy in years of a given country (x).
The results of the regression were:
=a+bx
a=-0.887
b=0.055
(a) Write the equation of the Least Squares Regression line of the form
(b) Which is a possible value for the correlation coefficient, r?
00.749
O-1.43
01.43
-0.749
(c) If a country increases its life expectancy, the happiness index will
increase
decrease

Transcribed Image Text:(d) If the life expectancy is increased by 0.5 years 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 79 years. Round to two decimal places. questions in Brand Brandon's iP

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