In Chapter 13, Exercise 12 related the number of sentences spoken by a person in a group to the extent the person is rated to be a leader:

\# sentences spoken \((X)\) : Range \(=0-35, \bar{X}_{i}=13.88, s_{X}=8.74\)

Rating of leadership \((Y)\) : Range \(=1-10, \bar{Y}=5.50, s_{Y}=2.45\), Correlation: \(r=.72\)

a. Calculate the regression equation predicting rating of leadership from sentences spoken and draw it in into a scatterplot.

b. What rating of leadership would you predict for a person who speaks 25 sentences?

Chapter 13, Exercise 12

What makes a joke funny? Sigmund Freud's research led him to theorize that people find jokes funnier when the jokes contain higher levels of sexuality or hostility. Kirsh and Olczak (2001) questioned whether gender affects this relationship between humor and hostility by measuring men's and women's reactions to comic books of differing levels of violence. The following data are representative of the women in their study. The researchers hypothesized that, because women find violence less humorous than do men, there is a negative relationship between the level of violence in a comic book ( \(1=\) low to \(7=\) high \()\) and how humorous women rate the comic book \((1=\) not at all humorous to \(6=\) extremely humorous). In other words, the higher the level of violence in the comic book, the less humorous the comic is to women.

Transcribed Image Text:

Woman Level of Violence Humorous Rating 1 2 4 2 7 3 3 6 3 4 3 4 5 4 61890 7 2 1 7 5 2 1 10 6 365 N 2