Each of a sample of 176 residents selected from a small town is asked how much money he or she spent last week on state lottery tickets. 130 of the residents responded with $0. The mean expenditure for the remaining residents was $21. The largest expenditure was $210. Step 5 of 5: What proportion of the sample did not purchase any lottery tickets? Express your answer as a simplified fraction or as a value rounded to one decimal place.
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- A polling company reported that 33% of 2286 surveyed adults said that they play football. Complete parts (a) through (d) below. C a. What is the exact value that is 33% of 2286? The exact value is (Type an integer or a decimal.) b. Could the result from part (a) be the actual number of adults who said that they play football? Why or why not? O A. No, the result from part (a) could not be the actual number of adults who said that they play football because that is a very rare activity. O B. Yes, the result from part (a) could be the actual number of adults who said that they play football because the results are statistically significant. O C. Yes, the result from part (a) could be the actual number of adults who said that they play football because the polling numbers are accurate. O D. No, the result from part (a) could not be the actual number of adults who said that they play football because a count of people must result in a whole number. c. What could be the actual number of…The average expenditure on Valentine's Day was expected to be $100.89 (USA Today, February 13, 2006). Do male and female consumers differ in the amounts they spend? The average expenditure in a sample survey of 44 male consumers was $137.38, and the average expenditure in a sample survey of 35 female consumers was $65.11. Based on past surveys, the standard deviation for male consumers is assumed to be $35, and the standard deviation for female consumers is assumed to be $12. The z value is 2.576. Round your answers to decimal places. b. At 99% confidence, what is the margin of error? c. Develop a 99% confidence interval for the difference between the two population means.A polling company reported that 53% of 2286 surveyed adults said that they play football. Complete parts (a) through (d) below. C a. What is the exact value that is 53% of 2286? The exact value is (Type an integer or a decimal.) b. Could the result from part (a) be the actual number of adults who said that they play football? Why or why not? O A. No, the result from part (a) could not be the actual number of adults who said that they play football because a count of people must result in a whole number. O B. Yes, the result from part (a) could be the actual number of adults who said that they play football because the results are statistically significant. O C. No, the result from part (a) could not be the actual number of adults who said that they play football because that is a very rare activity. O D. Yes, the result from part (a) could be the actual number of adults who said that they play football because the polling numbers are accurate. c. What could be the actual number of…
- A political pollster wants to ensure that their poll on attitudes toward separation of church and state gets responses from all major religious groups. What kind of sampling method should be used?According to Wine-Searcher, wine critics generally use a wine-scoring scale to communicate their opinions on the relative quality of wines. Wine scores range from 0 to 100, with a score of 95 – 100 indicating a great wine, 90 – 94 indicating an outstanding wine, 85 – 89 indicating a very good wine, 80 – 84 indicating a good wine, 75 - 79 indicating a mediocre wine, and below 75 indicating that the wine is not recommended. Random ratings of a pinot noir recently produced by a newly established vineyard in 2018 follow: Excel File: data07-11.xlsx 87 91 86 82 72 91 60 77 80 79 83 96 a. Develop a point estimate of mean wine score for this pinot noir (to 2 decimals). b. Develop a point estimate of the standard deviation for wine scores received by this pinot noir (to 4 decimals).Question One a) The University of the East Europe is interested in the overall performance of its students in the academic year 2020/2021. There were 1460 students registered for this academic year. The University decides to select a sample of 150 students from each of the 5 faculties- Science, Medicine, Law, Social Science and Humanities in proportion to the number of students in each faculty. Identify the population of interest for this scenario. ii. i. Identify the sampling technique used by the researcher. State one advantage and one disadvantage of the sampling technique described in the given scenario. If the medical faculty has 584 students registered, calculate how many medical students would be part of the sample of 150. iii. iv.
- A large consumer goods company ran a television advertisement for one of its soap products. On the basis of a survey that was conducted, probabilities were assigned to the following events. B = individual purchased the product S = individual recalls seeing the advertisement BnS = individual purchased the product and recalls seeing the advertisement The probabilities assigned were P(B) = 0.20, P(S) = 0.40, and P(BS) = 0.12. a. What is the probability of an individual's purchasing the product given that the individual recalls seeing the advertisement (to 1 decimal)? Does seeing the advertisement increase the probability that the individual will purchase the product? - Select your answer - As a decision maker, would you recommend continuing the advertisement (assuming that the cost is reasonable)? - Select your answer - + b. Assume that individuals who do not purchase the company's soap product buy from its competitors. What would be your estimate of the company's market share (to the…8.A simple random sample of 8 employees of a corporation provided the following information. Employee Age Gender 1 2 3 21 37 26 W M W 4 5 6 7 8 44 48 50 25 22 W W M M M (a) Determine the point estimate for the average age of all employees. (b) What is the point estimate for the standard deviation of the population? (Round your answer to four decimal places.) (c) Determine a point estimate for the proportion of all employees who are female.
- Select the scenario which is an example of voluntary sampling. Answer Keypad Keyboard Shortcuts Tables An airline is interested in getting feedback about their on-board catering experience. They place a questionnaire in the pocket behind each airline seat for passengers to O fill out. An urban planner is interested in determining the traffic volume along a particular road. To estimate the traffic volume, he counts the number of cars that go by during the next 30 minutes. O To determine the mean domestic electricity consumption in the region, the electric company collects data from randomly selected households in the given region. A fitness center has 400 male clients and 300 female clients. They plan to buy new equipment, so they randomly select 80 male clients and 60 female clients and ask them what equipment they use the most.Explain Standard errors for TSLS (two stage least squares)?The blood bank at a hospital has 1,200 units of blood, out of which 37% units are of blood group B+. A clinical researcher randomly selects 300 units of blood and finds that 33% of those are of blood group B+. To test his result, he randomly selects 200 units of blood and finds that 40% of those are of blood group B+. Which of the following is the reason there is a difference between the two percentages selected by the researcher?