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- 5 In the law firm Tybo and Associates, there are six partners. Listed is the number of cases each partner actually tried in court last month. Number of Cases 3 Partner Ruud Wu Sass Flores Wilhelms Schueller 6 3 3 0 1 a. How many different samples of 3 are possible using without replacement? Number of possible samples b & c. Using samples of size 3 without replacement, compare the mean of the distribution of sample means to the population mean. (Round your sample means and population mean answers to 2 decimal places.)Freshman 15, revisited In Exercise 6 you thought abouthow to design a study to see if it’s true that students tendto gain weight during their first year in college. Well,Cornell Professor of Nutrition David Levitsky did justthat. He recruited students from two large sections of an introductory health course. Although they were volun-teers, they appeared to match the rest of the freshman class in terms of demographic variables such as sex andethnicity. The students were weighed during the firstweek of the semester, then again 12 weeks later. Basedon Professor Levitsky’s data, estimate the mean weightgain in first-semester freshmen and comment on the“freshman 15.” (Weights are in pounds.) SubjectNumberInitialWeightTerminalWeightSubjectNumberInitialWeightTerminalWeight1 171 168 35 148 1502 110 111 36 164 1653 134 136 37 137 1384 115 119 38 198 2015 150 155 39 122 1246 104 106 40 146 1467 142 148 41 150 1518 120 124 42 187 1929 144 148 43 94 9610 156 154 44 105 10511 114 114 45 127 13012…3
- The Bureau of Labor Statistics provides the following data about U.S. workers ages 16 and older who were paid hourly rates in 2021. The table shows, overall and separately for men and women, the number of workers (in thousands, so that the upper left value of 76,125 represents over 76 million individuals) who were paid hourly that year and the number who earned the federal minimum wage or less. Characteristic Total, 16 years and older Men, 16 years and older Women, 16 years and older Number of workers (in thousands) Total paid hourly rates 76,125 38,089 38,036 At or below minimum wage 1,091 398 693 Express the value "693 thousands" in the table (lower right cell) as a sentence in context. There are 693 women 16 years and older who earned the federal minimu, wage or less. Fill in the blanks with the appropriate supporting evidence computed from the data table. Give all numerical answers as a number between 0 and 1, rounded to 3 decimal places (for ex., 0.111, no text). A U.S. worker…Beryllium disease: Beryllium is an extremely lightweight metal that is used in many industries, such as aerospace and electronics. Long-term exposure to beryllium can cause people to become sensitized. Once an individual is sensitized, continued exposure can result in chronic beryllium disease, which involves scarring of the lungs. In a study of the effects of exposure to beryllium, workers were categorized by their duration of exposure (in years) and by their disease status (diseased, sensitized, or normal). The results were as follows: Duration of Exposure 5 Diseased 15 7. 19 Sensitized 12 22 14 Normal 66 145 197 Send data to Excel Test the hypothesis of independence. Use the a = 0.10 level of significance and the P-value method with the TI-84 Plus calculator. What do you conclude?The table to the right gives the number of male and female workers earning at or below the minimum wage for several age categories. Complete parts (A) through (D) below. Males at Minimum Wage Males below Minimum Wage Females at Minimum Wage Females below Minimum Wage Totals Workers per Age Group (thousands) 16-19 20-24 25+ 391 162 256 198 106 189 375 165 525 260 208 594 1,224 641 1,564 (A) How many males are of age 20-24 and earn below minimum wage? There are males of age 20-24 earning below minimum wage. (Type a whole number.) (B) How many females are of age 20 or older and earn minimum wage? There are a total of (Type a whole number.) There are females of age 20 or older earning minimum wage. (Type a whole number.) (C) How many workers are of age 16-19 or males earning minimum wage? There are workers who are of age 16-19 or are males earning minimum wage. (Type a whole number.) (D) How many workers earn below minimum wage? workers earning below minimum wage. Totals 809 493 1,065…
- adapted from Safe and Healthy Travel to a Mass GatheringCenters for Disease Control and Prevention International events draw huge crowds and come with unique risks to travelers. Whether they are planned years in advance, such as the Olympics, or happen more spontaneously, such as a president's memorial service, mass gatherings present several problems. They are associated with crowding at venues, poor hygiene from temporary food and sanitation facilities, and challenging security situations. The risk of infectious diseases increases because of crowded conditions and the influx of attendees from around the world. A mass gathering can be thought of as any gathering of people that is large enough to strain local resources. Typically, they involve a large number of people—sometimes numbering in the millions—at a specific location, for a specific purpose, and for a defined time frame. 16 Select the correct location on the image. Which flash card correctly explains…16. Teaching Assistants' Stipends A random sample of stipends of teaching assistants in economics is listed. Is there sufficient evidence at the a = 0.05 level to con- clude that the average stipend differs from $15,000? The stipends listed (in dollars) are for the academic year. 14,000 13,419 16,338 18,000 12,000 14,356 13,185 14,000 15,000 11,981 17,604 12,283Household Income Profile of the 400 Households in a Community in 1999 Household Income Category Under $20,000 $20,000 to $29,999 $30,000 to $39,999 $40,000 to $49,999 $50,000 to $99,999 $100,000 to $299,999 $300,000 to $499.999 $500,000 and over Number of Households 30 70 90 110 80 10 5 If 3 different households of the 400 are to be chosen at random for a marketing survey, which of the following is closest to the probability that all 3 households chosen had incomes of $50,000 or more in 1999? 0.0001 0.001 0.005 0.015 0.045 If no two households in the community had the same income, and if the greatest household income had the greatest percentile ranking, which of the following could have been the income at the 85th percentile ranking of the 400 household incomes? $48,250 $79,350 $105,600 $345,750 $841,150 Select one answer choice.
- Risk of Stroke (%) Age Pressure Smoker (Yes=1) 12 57 152 0 24 67 163 0 13 58 155 0 56 86 177 1 28 59 196 0 51 76 189 0 18 56 155 1 31 78 120 0 37 80 135 1 15 78 98 0 22 71 152 0 36 70 173 1 15 67 135 1 48 77 209 0 15 60 199 0 36 82 119 1 8 66 166 0 34 80 125 1 3 62 117 0 37 59 207 1 1. Interpret regression coefficient of Age (b1), Pressure (b2), and Smoker (b3), respectively. 2. The regression coefficient of Age (b1) are different in the estimated simple regression equation and estimated multiple regression equation. Can you explain why? 3. If we choose the significance level α=0.05, is the variable Smoker a significant factor in explaining the risk of a stroke? Explain.Cross Tabulation -What percentage of households headed by bachelor’s degree recipients earn $75, 000 or more?
