Question
Asked Nov 18, 2019
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Age  Incident CVD No CVD Total
< 50 45 555 600
50+ 61 339 400
Total 106 894 1000

Is age independent of incident CVD? Preform a chi-squared test of independence. Remember to document the 5 steps used in hypothesis testing. Why is age a confounding factor in this example? 

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Expert Answer

Step 1

Given data table in the this question is,

Age 

Incident CVD

No CVD

Total

< 50

45

555

600

50+

61

339

400

Total

106

894

1000

 

Step 2

The hypothesis is as:

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Null Hypothesis, H age is not independent of incident CVD Alternative Hypothesis, H:age is independent of incident CVD

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Step 3

Number of rows (r) = 2

Number of columns (c) = 2

Now, degre...

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df (number of rows -1) x (number of columns -1) =(r-1)(c-) (2-1)(2-1) =1

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Math

Statistics

Advanced Topics in Statistics

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