A study found that there is a positive linear relationship between the life expe

Question

A study found that there is a positive linear relationship between the life expectancy of citizen of a country and the number of television sets per household there are, the higher the life expectancy is for that country. which conclusion can be drawn from this. choose 2 answers

a. there is a causal relationship between a country's life epectancy and the number of tv sets per household

b. an increase in the number of tv sets per household will cause the country to have a higher life expectancy

c. there is an association between a country's life expectancy and the number of TV sets per household

d. increasing income level is a potential lurking variable that is causing both of these variables to increase

e. an increase in the life expectancy for a country will cause that country to have more tv's per household.

Explanation / Answer

There is no direct association between life expectancy and the number of televesion sets per household, probably due to increased income comes bettwe healthcare which results in higher life expectancy also higher income helps higher number of televesion sets per household.

So, I think increasing income level is a potential lurking variable that is causing both of these variables to increase

option (d) is correct

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