In a Study of Low Tar Cigarettes, Five Cigarettes from Each

question 37

Multiple Choice

In a study of low tar cigarettes, five cigarettes from each of three brands were tested to see if the mean amount of tar per cigarette differs among the brands. i. There are 2 degrees of freedom for the numerator.
ii. There are 12 degrees of freedom for the denominator.
iii. If the sum of squares for the brands is 0.07, the mean square for brands is 0.035.

• A) (i), (ii), and (iii) are all correct statements.
• B) (i) and (ii) are correct statements but not (iii).
• C) (i) and (iii) are correct statements but not (ii).
• D) (ii) and (iii) are correct statements but not (i).
• E) (i), (ii), and (iii) are all false statements.

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Definitions:

Environmental Protection Agency

A federal agency tasked with protecting human health and the environment by enforcing regulations based on laws passed by Congress.

National Ambient Air Quality Standards

Standards established by the United States Environmental Protection Agency under the Clean Air Act that apply for outdoor air throughout the country.

EPA

The Environmental Protection Agency (EPA) is a U.S. federal agency responsible for protecting human health and the environment by enforcing regulations based on laws passed by Congress.

Clean Air Act

A federal law in the United States aimed at controlling air pollution on a national level by authorizing the Environmental Protection Agency (EPA) to establish standards for harmful pollutants.