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 (y beats per minute) 173 158 143 (a) Find the linear correlation coefficient for the data. (Round your answer to two decimal places.) -1 (b) What is the significance of the value found in part (a)? O The slope of the regression is about half of what the expected value is. O The graph of the regression points passes through none of the data points. O The graph of the regression points passes through all three data points. O The linear correlation coefficient should always be positive. O One of the data points is the y-intercept. (c) Find the equation of the least-squares regression line. (Round your answers to two decimal places.) -0.85x + 187 (d) Use the equation of the least-squares line from part (c) to predict the maximum exercise heart rate for a person who is 69. (Round your answer to the nearest whole number.) 128 x beats per minute (e) Is the procedure in part (d) an example of interpolation or extrapolation? O interpolation

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 (y beats per minute) 173 158 143 (a) Find the linear correlation coefficient for the data. (Round your answer to two decimal places.) -1 (b) What is the significance of the value found in part (a)? O The slope of the regression is about half of what the expected value is. O The graph of the regression points passes through none of the data points. O The graph of the regression points passes through all three data points. O The linear correlation coefficient should always be positive. O One of the data points is the y-intercept. (c) Find the equation of the least-squares regression line. (Round your answers to two decimal places.) -0.85x + 187 (d) Use the equation of the least-squares line from part (c) to predict the maximum exercise heart rate for a person who is 69. (Round your answer to the nearest whole number.) 128 x beats per minute (e) Is the procedure in part (d) an example of interpolation or extrapolation? O interpolation

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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