study was conducted to determine whether big-city and small-town dwellers differed in their helpfulness to strangers. In the study, the investigators rang the doorbells of strangers living in Toronto or small towns in the vicinity. They explained they had misplaced the address of a friend living in the neighborhood and asked to use the phone. The following data show the number of individuals who admitted or did not admit the strangers (the investigators) into their homes:   Admitted strangers into their home Did not admit strangers into their home   Big-city dweller 60 90   Small-town dweller 70 30

The following data represent the responses to two questions asked in a survey of 10 college students majoring in business-What is your gender? (male = M; female = F) and What is your major? (accounting = A; computer information systems = C; marketing = M). Complete parts (a) and (b). м м M A C Gender: F F M F M Major: M A A A a. Tally the data into a contingency table where the two rows represent the gender categories and the three columns represent the academic-major categories. Student Major Categories Gender A Totals Male 3 6 Female 1 2 4 Totals 4 4 10 b. Construct contingency tables based on percentages of all 10 student responses, based on row percentages and based on column percentages. Complete the following contingency table based on total percentages. Student Major Categories Gender A M Totals Male 30.00 10.00 20.00 60.00 Female 10.00 10.00 20.00 40.00 Totals 40.00 20.00 40.00 100.00 (Round to two decimal places as needed.) Complete the following contingency table based on row…

A local health department believes that a store is merchandising its cereal aisle in a way that puts sugary cereal brands at eye level for children. The store claims that it is not considering sugar content and is stocking the shelves based on other factors. An inspector visited the store and recorded the sugar content per serving listed on the boxes (sugar content for each box is listed under the shelf where that box of cereal is located). Shelf 1 Shelf 2 Shelf 3 Shelf 4 7 13 6 10 8. 5 14 7 8 11 11 10 11 3 a) What are the treatment groups, and how many experimental units are there per treatment? b) If instead of using the content listed on the box, the inspector sampled from multiple boxes of each brand of cereal and tested them for sugar content. How many experimental units were there be if there were 10 boxes per brand on the shelf? Explain your answer. [hint: all the boxes for each brand will be in one place] c) State the null hypothesis and create an ANOVA table based on sugar…

In a recent survey, consumers were asked where they did their gift shopping. The following results were obtained:  621 shopped at Macy's, 513 shopped at Emporium, 367 shopped at Nordstrom, 723 shopped at Emporium, or Nordstrom, 749 shopped at Macy's or Nordstrom, 157 shopped at all three, 96 shopped at neither Macy's nor Emporium nor Nordstrom. a. What percent of the consumers shopped at more than one store? b. What percent of the consumers shopped exclusively at Nordstrom?