A list is obtained of the 150 different locations throughout the city that hold flu shot clinics. A sample of clinics is selected by first choosing a random starting point between 1 and 15 then choosing every 15th clinic on the list after that point, and the number of flu shots given on a specific day is recorded. The results were as follows. 25, 26, 31, 63, 64, 65, 69, 73, 79, 125 LO USE SALT (a) What sampling method was used? simple random sampling systematic sampling stratified sampling O convenience sampling cluster sampling (b) What is the median number of flu shots given?The teachers in the math department were trying to estimate typical class size. They each recorded the number of students in their rst-period class. The results were as follows. 9 11 13 1417 172222 23 24 2425 25 2525 2627 l2 USE SALT (a) What is the mean? (Round your answer to four decimal places.) (b) What is the median? (c) What is the mode? It has been claimed that over a lifetime, an American woman will spend $125,000 on clothes, including 3,000 items271 pairs of shoes, 185 dresses, and 145 bags. How many pairs of shoes do the women you know own? You decide to ask 10 of your female friends and family members how many pairs of shoes they currently own. (a) What is the population of interest? all women your 10 female friends and family members / ' all American women all the women you know (b) What sampling method did you use? " convenience sampling systematic sampling " simple random sampling ' cluster sampling stratied sampling (c) The number of pairs of shoes your female friends reported were as follows. 9, 12, 14, 20, 21, 24, 37, 45, 45, 51 m use SA What is the mean number of pairs of shoes for your friends? (d) What is the median number of pairs of shoes for this sample of your friends? A survey was conducted by a psychology student at a local university. One question asked respondents to estimate how many times per day they experienced stress. The responses are recorded below. Tlmes/ Day Stressed 0 1 2 3 4 Welgl'lt 0.26 0.18 0.19 0.20 0.17 (a) Is the average number of times per day students experienced stress a parameter or a statistic? parameter " statistic (b) Determine whether the following statement is true or false. If the psychology student surveyed 140 freshmen in an introductory psychology course, the sample would not be an example of a simple random sample. " True / ' False (c) what is the weighed mean? The weighted mean of the number of times that respondents felt stressed per week is 5. [-I1 Points] I DETAILS I STATSQC14.1C.004.DS. Consider the following data. What is the weighed mean? The value of the weighed mean is 6. [-I1 Points] DETAILS ILLOWSKYINTROSTAT1 2.6.052.PR. When the data are skewed right, what is the typical relationship between the mean and median? Only the mean exists. " Only the median exists. The mean is smaller than the median. '* The mean and median are equal. The median is smaller than the mean. (a) Fill in the blank. To find the lower quartile, find the Select--- O of the lower half of the data set. (b) Fill in the blank. To find the -Select- @ , find the median of the upper half of the data set.A French perfume company asked 25 shoppers to watch a commercial about their product and then sent them shopping. They recorded the euros spent on their perfume below. 0, 381, 297, 0, 372, 197, 184, 308, 0, 527, 579, 0, 180, 0, 188, 596, 334, 243, 166, 0, 90, 151, 342, O, 293 IE USE SALT (a) What proportion of the shoppers didn't buy any perfume? (b) 25% of the shoppers spent at most what amount on perfume? 25% of the shoppers spent at most euros. (c) 50% of the shoppers spent at least what amount on perfume? 50% of the shoppers spent at least euros. (d) 75% of the shoppers spent less than what amount on perfume? 75% of the shoppers spent less than euros. Mrs. Bone is the principal of Rauton Elementary School. She is concerned about school testing and its effect on how excited children are about coming to school. She randomly assigned a class of third graders to 2 groups. One group participated in school testing, and the other did not. She asked the children, "On a scale of 1 to 10, with 1 being the lowest and 10 being the highest, how excited are you about coming to school?" The results are listed below. No testing: 3, 3, 6, 7, 7, 8, 8, 8, 8, 9. 9 Testing: 2, 2, 3, 3, 4, 5, 6, 9, 10, 10, 10 (3) Which group had the higher lower quartile? no testing group testing group (b) which group had the higher median or middle quartile? no testing group ' ' testing group (c) Which group had the higher upper quartile? '\\ no testing group ' \\ testing group (c) Mrs. Bone's district superintendent hears about the report. He is a big advocate of school testing. which number will he report to the school board? the middle quartile the lower quartile the upper quartile In experiments in chemistry, the theoretical outcome can often be calculated and is usually given as a percentage. The difference between the actual outcome and the theoretical outcome is called the experimental error. Dr. Wantanabe is being reviewed for a promotion. She has been asked to provide information about the experimental error for her last 15 experiments as part of the review. She is trying to decide whether she will show them the middle quartile or the mean of the following percents. 1%, 2%, 2%, 6%, 5%, 2%, 9%, 11%, 16%, 2%, 1%, 1%, 5%, 3%, 5% IA usss (a) What is the middle quartile of the experimental errors? The middle quartile is %. (b) What is the mean of the experimental errors? (Round your answer to four decimal places.) The mean is %. (c) Should she point out the middle quartile or the mean to the review committee? The middle quartile; the data is roughly symmetric. The mean; the data is le skewed. ' \\ The middle quartile; the data is right skewed. The mean; the data is roughly symmetric