Some Clinical Psychologists believe that there may be arelationship between personality fype & vulnerability to heart attack. Specifically, they believe that TYPE A personality individuals might suffer more heart attacks than TYPĖ B personality individuals. We select 80 individuals at random & give them a personality test to determine if they are Type A or B. Then, we record how many Type A's & how many Type B's have & have not had heart attacks. We can display the observed frequencies in a contingency table: Personality Type Heart Attack Status Туре А Туре В Heart Attack 25 10 No Heart Attack 40

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Set up the null and alternative hypothesis

     Ho:

     Ha:

What are the degrees of freedom?

Calculate the chi square statistic. ( Round to two decimal places) 

Find the p-value. (Round to 8 decimal places). 

Do we reject or fail to reject the null hypothesis?

Some Clinical Psychologists believe that there may be arelationship between personality type
& vulnerability to heart attack. Specifically, they believe that TYPE A personality individuals
might suffer more heart attacks than TYPĖ B personality individuals. We select 80
individuals at random & give them a personality test to determine if they are Type A or B.
Then, we record how many Type A's & how many Type B's have & have not had heart attacks.
We can display the observed frequencies in a contingency table:
Personality Type
Heart Attack
Status
Туре А
Туре В
Heart Attack
25
10
No Heart Attack
40
Transcribed Image Text:Some Clinical Psychologists believe that there may be arelationship between personality type & vulnerability to heart attack. Specifically, they believe that TYPE A personality individuals might suffer more heart attacks than TYPĖ B personality individuals. We select 80 individuals at random & give them a personality test to determine if they are Type A or B. Then, we record how many Type A's & how many Type B's have & have not had heart attacks. We can display the observed frequencies in a contingency table: Personality Type Heart Attack Status Туре А Туре В Heart Attack 25 10 No Heart Attack 40
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