The National Retail Federation sponsors surveys of consumer behavior. One such survey, conducted on a yearly basis, asks American adults whether they plan to celebrate Mother's Day, what kind of gift(s) they plan to buy, and how much they plan to spend. The 2007 survey was conducted on April 4-11 with 7859 consumers participating. Of these respondents, 84.5% said that they were planning to celebrate Mother's Day, expecting to spend an average of $139.14. Are the values listed (84.5%, $139.14) parameters or statistics? Explain. parameters, because they describe the sample of 7859 adult Americans parameters, because they describe all adult Americans statistics, because they describe all adult Americans statistics, because they describe the sample of 7859 adult Americans Consider the following dotplots of (hypothetical) ages for three groups of people. Which group tends to have the youngest ages? Group A 15 Group BT 20 25 30 35 Group C-T 15 T 20 15 T 30 25 4 20 25 09.00 35 30 T 35 40 40 40 00.00.009 45 50 45 12.0 50 45 50 55 60 65 IU 55 55 Age (in years) Group A Group B Group C can't tell without more information T 60 65 60 65 70 70 029 70 75 75 75 80 80 85 85 85 Page 18 of 50