Answered: A 10-year study conducted by the…

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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Question

A 10-year study conducted by the American Heart Association provided data on how age, blood pressure, and smoking related to the risk of strokes. The data file “Statsdata2.xslx” includes a portion of the data from the study. The variable “Risk of Stroke” is measured as the percentage of risk (proportion times 100) that a person will have a stroke over the next 10-year period.

Use Excel’s Data Analysis tool to conduct a simple linear regression between Risk of Stroke and Age. Choose confidence level at 95%.

Please copy and paste the regression analysis output below.

1. Based on the simple regression analysis output, write the estimated regression equation.

2. If we choose the significance level α=0.05, is Age a significant factor in explaining the risk of a stroke? Explain.

3. What is the coefficient of determination (R-square)? How to interpret R-square?

Risk of Stroke (%)	Age	Pressure	Smoker (Yes=1)
12	57	152	0
24	67	163	0
13	58	155	0
56	86	177	1
28	59	196	0
51	76	189	0
18	56	155	1
31	78	120	0
37	80	135	1
15	78	98	0
22	71	152	0
36	70	173	1
15	67	135	1
48	77	209	0
15	60	199	0
36	82	119	1
8	66	166	0
34	80	125	1
3	62	117	0
37	59	207	1