Researchers Reported That for Men,being Unmarried Increases the Risk of Depression.These

question 30

Multiple Choice

Researchers reported that for men,being unmarried increases the risk of depression.These findings were based on the medical records of 400 married men and 500 unmarried men.Since there is no random assignment,this conclusion is not justified because there may be lurking variables.Which of the following are possible lurking variables?
I: Rate of depression
II: Income
III: Type of employment
IV: Age
V: Gender

• A)II,III,IV
• B)III,IV
• C)II,IV
• D)II,III,IV,V
• E)I,II,III

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Definitions:

Population Variance

A measure of the dispersion of a set of data points in a population from their mean value, representing how spread out the population values are.

Unbiased Estimator

A statistical estimator whose expected value equals the true value of the parameter it estimates.

Sample Mean

The arithmetic average of a set of sample values, used as an estimate of the population mean.

Population Mean

The average value of a characteristic in the entire population of interest.