The alternative hypothesis is: Hị : CVD and Enrollment Site are dependent. H1 : The correlation between CVD and Site is zero. H1 : CVD and Enrollment Site are independent.
The alternative hypothesis is: Hị : CVD and Enrollment Site are dependent. H1 : The correlation between CVD and Site is zero. H1 : CVD and Enrollment Site are independent.
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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Transcribed Image Text:a)
The alternative hypothesis is:
Hị : CVD and Enrollment Site are dependent.
H1 : The correlation between CVD and Site is zero.
Hị : CVD and Enrollment Site are independent.
H1 : The covariance between CVD and Enrollment Site is negative.
H1 : The covariance between CVD and Site is zero.
H1 : The covariance between CVD and Enrollment Site is positive.
b)
Under independence, calculate the expected number of patients with a family history of CVD, at Hospital 3.
Round your answer to 2 decimal places.
Transcribed Image Text:A cross-sectional study is conducted to investigate cardiovascular disease (CVD) risk factors among a sample of patients seeking medical care
at one of three local hospitals. A total of 900 patients are enrolled. Based on the following data, we would like to determine if there is a
significant association between the family history of CVD and the enrollment site.
TITU
Enrollment Site
Family History of CVD
Hospital 1
Hospital 2
Hospital 3
Total
Yes
34
8
58
100
No
208
144
448
800
Total
242
152
506
900
• Given:
o The value of the test statistic is
x2 = 7.442.
o Use a = 0.01 as the level of significance.
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