An aerobic exercise instructor remembers the data given in the following table, which shows the recommended maximum exercise heart rates for individuals of the given ages. (A graphing calculator is recommended.) Age (x years) 20 40 60 Maximum heart rate 165 148 131 (y beats per minute) (a) Find the linear correlation coefficient for the data. (Round your answer to two decimal places.) (b) What is the significance of the value found in part (a)? O One of the data points is the y-intercept. O The graph of the regression points passes through none of the data points. O The slope of the regression is about half of what the expected value is. O The linear correlation coefficient should always be positive. O The graph of the regression points passes through all three data points. (c) Find the equation of the least-squares regression line. (Round your answers to two decimal places.)

An aerobic exercise instructor remembers the data given in the following table, which shows the recommended maximum exercise heart rates for individuals of the given ages. (A graphing calculator is recommended.) Age (x years) 20 40 60 Maximum heart rate 165 148 131 (y beats per minute) (a) Find the linear correlation coefficient for the data. (Round your answer to two decimal places.) (b) What is the significance of the value found in part (a)? O One of the data points is the y-intercept. O The graph of the regression points passes through none of the data points. O The slope of the regression is about half of what the expected value is. O The linear correlation coefficient should always be positive. O The graph of the regression points passes through all three data points. (c) Find the equation of the least-squares regression line. (Round your answers to two decimal places.)

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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