Question

A physician is investigating the claim that the maximum heart rate an individual can reach during intensive exercise decreases with age. She randomly selects 10 people and records their age and their maximum heart rate after an exercise stress test. The data are shown below, with the SPSS output.

Standardized Unstandardized Coefficients Coefficients Std. Error Sig. Beta Model 36.889 7.074 6.025 222.271 (Constant) Age .929 161 1.141 Dependent Variable: Max HR

Age (years)	30	38	41	38	29	39	46	41	42	24
Max. Heart Rate	186	183	171	177	191	177	175	176	171	196

a) State the linear regression equation.

b) Can you interpret the meaning of the y-intercept in the context of this study? Explain.

c) Interpret the slope of the regression equation in the context of these variables.

d) Perform the hypothesis test for the slope, and give your conclusion in words, in the context of the physician’s claim.

(Show all working out and no technology)

Answer 1

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