Page 1 of 5 Quiz 1 Stat 200 (Clary) (6382, 2152) Instructions: Record your answers and work in the space below each problem. Be sure to record the final answer next to \"Answer\" and show all your calculation steps or assumptions under \"Work.\" You can type in your calculations, use the equation tool, or insert images of your handwritten calculations. If you have a tablet with a stylus, it may even be possible to write directly into the table cell. Whatever you do, make sure it is clear and neat. Thanks. Remember to add your last and first name to the end of the file name and upload your answers here (e.g., Quiz1.LASTNAME_FIRSTNAME.docx) before submitting. Proble m Number #1 (4 pts) Problem and Solution Identify: a. the population, b. the sample, c. the parameter, d. the statistic, e. the variable, and f. the data. Give examples where appropriate. Pollsters at Gallup interested in the proportion of people who will vote for Donald Trump in the 2016 Presidential Election. Answer: Work: #2 (4 pts) Name the sampling method used in each of the following situations: a. Instagram wants to determine what proportion of their users are college students. An analyst creates a code that will look for college affiliation in every third Instagram account. b. The Democratic National Committee wants to know the reaction of voters to a debate between Bernie Sanders and Hillary Clinton. The day after the debate, the DNC polling staff calls 1,200 randomly selected phone numbers. If a registered Democratic voter answers the phone or is available to come to the phone, the voter is asked whom he or she intends to vote for and whether the debate changed his or her opinion of the candidates. c. Your stats professor wants to know if her online students are putting off their homework to the last minute, so at the beginning of the week, she randomly selects students with last names that Page 2 of 5 start with C and S, and then asks them to present the solution to the first homework problem in the discussion forum. d. The head of student services at the UMUC College Park campus is handing out questionnaires to UMUC students asking them to evaluate the tutoring services offered on campus. She does not ask students who are hurrying to get to classes, but instead asks all students who are sitting around waiting for their next class. e. American Express is giving away free tickets to Beyonc's Formation World tour and a meetand-greet with Beyonc and Jay Z. Beyonc wants to make sure that there are winners from every major city she is touring in, so her manager randomly selects two winners from the fan club of each city where her tour stops. Answer: Work: #3 (4 pts) Sixty teenagers with iPhones were asked the number of times per week they used social media to say mean things about other teenagers. The (incomplete) results are shown below Bullying Frequency of Teenagers Over Social Media # Flossing per Frequency Relative Week Frequency 0 34 1 2 4 3 2 4 1 a. Fill in the blanks in the table above Cumulative Relative Freq. b. What percent of teenagers bullied others over social media once a week? c. What percent bullied up to three times per week? Answer: Work: Page 3 of 5 #4 (4 pts) The following data show the lengths of boats moored in a marina. The data are ordered from smallest to largest: 16; 17; 19; 20; 20; 21; 23; 24; 24; 24; 25; 26; 26; 26; 27; 27; 28; 28; 29; 29; 30; 32; 35; 35; 37; 39; 40 Find the Mean, Median, and Mode for this data set. Answer: Work: Page 4 of 5 #5 (4 pts) The most obese countries in the world have obesity rates that range from 11.4% to 74.6%. This data is summarized below. Percent of Population Obese Number of Countries 11.4-20.45 29 20.45-29.45 13 29.45-38.45 4 38.45-47.45 0 47.45-56.45 2 56.45-65.45 1 65.45-74.45 0 74.45-83.45 1 a).What is the best estimate of the average obesity percentage for these countries? b).What is the standard deviation for the listed obesity rates? c). The United States has an average obesity rate of 33.9%. Is this rate above average or below? d). How \"unusual\" is the United States' obesity rate compared to the average rate? Explain. Page 5 of 5 Answer: Work