5.1 According to \"Films and Hormones,\" researchers at the University of Michig

Question

5.1 According to "Films and Hormones," researchers at the University of Michigan report that the male hormone [testosteronel rose as much as 30% in men while they watched The Godfather, Part II. Love stories and other ‘chick flicks, had a different effect: They made the 'female hormone, progesterone rise 10% in both sexes. But not all films will make you more aggressive or romantic. Neither sex got a hormone reaction from a documentary about the Amazon rain forest."3 This study involved four variables: testosterone progesterone, type of film, and gender. a. Classify the variable for testosterone as being quantitative or categorical, and as explanatory or response. If it is categorical, tell how many possible values it can take. b. Classify the variable for type of film as being quantitative or categorical, and as explanatory or response. If it is categorical, tell how many possible values it can take. c. Classify the variable for gender as being quantitative or categorical, and as explanatory or response. If it is categorical, tell how many possible values it can take.

Explanation / Answer

(Answers are based on the given information.)

Part a

The variable testosterone is classified as quantitative, because it is measured in percentages and it have ratio scale of measurement level.

The variable testosterone is a response variable, because rise in testosterone is based on independent variable type of movie.

Part b

The variable type of film is classified as categorical and it is explanatory variable, because it explains the rise in dependent variable testosterone or progesterone. The categorical variable type of film has two possible values as ‘love story’ or other movies.

Part c

The variable gender is classified as categorical variable and it is independent or explanatory variable. The categorical variable gender has two possible values as male and female.

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