Heart Disease Begins with _____

question 67

Multiple Choice

Heart disease begins with _____.

• A)formation of cholesterol-rich plaque under the endothelium lining of the artery
• B)narrowing of the arteries
• C)damage to the lining of the coronary arteries
• D)reduced blood flow to the heart
• E)hypertension

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Definitions:

Null Hypothesis

A default hypothesis that there is no effect or no difference, and any observed deviation in data is due to chance.

Degrees Of Freedom

The number of independent values or quantities which can be assigned to a statistical distribution minus the number of parameters estimated.

Significance Level

The probability of rejecting the null hypothesis in a statistical test when it is true, commonly set at 0.05 or 5%.

Chi-Square Value

A statistic that measures the difference between observed and expected frequencies to test for independence in categorical variables.