20. Is the Home Field Advantage Independent of the Sport? Winning team data were collected for teams in different sports, with the results given in the table below. Use a 0.10 significance level to test the claim that home/visitor wins are independent of the sport. Given that among the four sports included here, baseball is the only sport in which the home team can modify field dimensions to favor its own players, does it appear that baseball teams are effective in using this advantage? Home Team Wins Visiting Team Wins Basketball Baseball Hockey 127 71 53 47 50 43 Football 57 42

A group of boys believe that there is a relationship between the act of sending flowers to a girl and texts received as a result. A study was carried out in which a sample of girls were asked whether they received any flowers and how many texts they sent in response. a)What type of variable is the explanatory variable? Quantitative Categorical   b) What type of variable is “number of texts sent in response?” Categorical Quantitative   c)What type of visual display should be used to summarize this data?   Bar chart Side-by-side boxplots Histogram Dot plot

The Bureau of Labor Statistics reports that the official unemployment rate for Black people was 10.4% and 4.7% for White people in February 2015. Select all correct answers for this question. O The samples of white and black people are independent. The explanatory variable is the unemployment rate. The response variable is the unemployment rate. The response variable is race.

The Bem Sex Role Inventory (BSRI) provides independent assessments of masculinity and femininity in terms of the respondent's self-reported possession of socially desirable, stereotypically masculine and feminine personality characteristics. Alison Konrad and Claudia Harris sought to compare northern U.S. and southern U.S. men on their judgments of the desirability of 40 masculine, feminine, or androgynous traits. Suppose that the following are the scores from a hypothetical sample of northern U.S. men for the attribute Ambitious. Calculate the mean, degrees of freedom, variance, and standard deviation for this sample. M = df s² 4 1 35 2 Suppose that the following are the scores from a hypothetical sample of southern U.S. men for the attribute Gullible. M df Calculate the mean, degrees of freedom, variance, and standard deviation for this sample. 5² in 6 7 556 4 11 |||| II