A study on how the time of exercise affects heart rate had the following output Simple Linear regression results: Dependent Variable: Heart Rate Independent Variable: Exercise time Sample size: 64 R (correlation coefficient) 0.467 R-sq 0.2181 Estimate of error standard deviation: 0.196338 Parameter estimates: Parameter Estimate Std. Err. DF T-Stat P-Value Intercept 2.12737 Slope 62 0.687 0.4947 0.386263 0.092874 62 4.159 0.0001 3.0966 According to the output, if I exerclse for time=129, what should be my heart rate? e 4 decimal places X After exercising everybody has different heart rates, which means there is a lot of variability in heart rates. How much of that variability is explained by exercise time? Use 4 decimal places
