Suppose that a South African Broadcasting Corporation (SABC) official wants to conduct a survey in Limpopo to estimate, with 95% confidence, a support for the premier's strategies on economy within 3% error. If the official has initial estimate that 70% of the people in Limpopo support the economic strategies of the premier. How many people should SABC survey?
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- The rabies vaccine for dogs can save your dog's life. If your dog bites another animal or is on the receiving end of a bite, the vaccine can protect them from a dangerous and potentially fatal illness. Furthermore, in most places, the rabies vaccine for dogs is legally required. The NYC Department of Health wants to know if LESS than 95% of the dogs in the city have been vaccinated with their rabies vaccine. 158,045 of the 165,000 dogs examined had their rabies shots. Risk no more than 5% Type I error. . What is the Z CRIT? A + 1.96 B + 1.645 C - 1.96 D - 1.645In 2001, the Gallup poll found that 81% of American adults believed that therewas a conspiracy in the death of President Kennedy. In 2013, the Gallup pollasked 1,039 American adults if they believe there was a conspiracy in theassassination, and found that 634 believe there was a conspiracy ("Gallup newsservice," 2013). Do the data show that the proportion of Americans who believein this conspiracy has decreased? Test at the 1% level.In a survey, respondents were asked to disclose their political affiliation (Democrat, Independent, Republican) and also answer the question "Would you be willing to pay higher taxes if the tax revenue went directly toward deficit reduction?" Create a contingency table and determine whether the results suggest there is an association between political affiliation and willingness to pay higher taxes to directly reduce the federal debt. Use the a= 0.05 level of significance. Click the icon to view the results of the survey. Construct a contingency table. Democrat Independent Republican Willing to pay higher taxes? Yes. No 9 7 6 3 11 14
- One of New England Air's top competitive priorities is on-time arrivals. Quality VP Clair Bond decided to personally monitor New England Air's performance. Each week for the past 30 weeks, Bond checked a random sample of 100 flight arrivals for on-time performance. Click the icon to view the table that contains the number of flights that did not meet New England Air's definition of on time. a) The overall fraction of late flights is (enter your response as a real number rounded to two decimal places.) Using a 95% confidence level, the upper and lower control limits are: Upper control limit (UCL) = Lower control limit (LCLp) = b) Assume that the airline industry's upper and lower control limits for flights that are not on time are 0.1000 and 0.0300, respectively. Choose the correct control chart below. O A. Percentage of late flights 0.14- 말 0.12- 0.10- 0.08- 0.06- 0.04- 0.02- 0.00- O A. Percentage of late flights O O c) Choose the chart below that correctly plots the percentage of late…The North American Free Trade Agreement (NAFTA) enacted in 1994 is a trilateral trade agreement signed by the United States, Canada and Mexico. This trade agreement has been controversial since its inception and Americans remain split on the issue. In a Gallup Poll conducted February 1-5, 2017, 447 out of 971 randomly selected Americans aged 18 or older stated that they believed that NAFTA was bad for the United States. 1.Find the point estimate for the proportion of Americans who believe that NAFTA was bad for the United States. Round your answer to 4 decimal places. 2.Find the margin of error for a 95% confidence interval. Round your answer to 4 decimal places. 3.Construct the 95% confidence interval for the proportion of Americans who believe that NAFTA was bad for the United States. Enter your answer as an open interval of the form (a,b) and round to 3 decimal places.he North American Free Trade Agreement (NAFTA) enacted in 1994 is a trilateral trade agreement signed by the United States, Canada and Mexico. This trade agreement has been controversial since its inception and Americans remain split on the issue. In a Gallup Poll conducted February 1-5, 2017, 420 out of 912 randomly selected Americans aged 18 or older stated that they believed that NAFTA was bad for the United States. Find the point estimate for the proportion of Americans who believe that NAFTA was bad for the United States. Round your answer to 4 decimal places. Find the margin of error for a 95% confidence interval. Round your answer to 4 decimal places. Construct the 95% confidence interval for the proportion of Americans who believe that NAFTA was bad for the United States. Enter your answer as an open interval of the form (a,b) and round to 3 decimal places. Can you conclude that more than half of Americans believe that NAFTA was bad for the United States? No conclusions can…
- How does the racial composition of American society (white-77%, Black-13%, Hispanic-17%) compare to the racial composition of Death Row inmates? How does each region in the United States compare regarding the number of executions? What social factors or social factors could be used to explain why certain geographic regions of society have higher execution rates? What variable or social factor is missing from the Death Penalty Information Online fact sheet that could explain the disproportionate representation of African-Americans on death row? Why is this variable important in understanding the broader picture of death row incarceration? Compare the support for a life sentence without parole with the support for the death penalty. Were you surprised? Why? Which theoretical perspective (structural-functionalist, symbolic-interactionist, conflict, or feminist) discussed in chapter seven (deviance) could you use to explain the disparity of African-Americans, minorities, and poor people on…I am only given one attempt at this. I need help. A newspaper report conducted a survey of 753 people in New York City and found that 27% of the population believe that the Yankees will miss the playoffs this year. In the accompanying dialogue, the report states, we are 99% confident that the true proportion of people in New York City who believe that the Yankees will miss the playoffs this year lies between 23% and 31% . What does 4% represent in the report? A. a parameterB. a statisticC. a confidence intervalD. a margin of errorE. a confidence levelBy a small margin, Facebook remains the top choice of social media over all ages, with 29% using Facebook most often among those using social media sites. However, more visually oriented social networks such as Snapchat and Instagram continue to draw in younger audiences. When asked "Which one social networking brand do you use most often?" the results in the table show the top brands chosen by Americans aged 12-34 who currently use any social networking site or service. Social M edia Site Faceboo k Snapchat Instagra m Twitter Percentage That Use Most Often 29 28 26 6 20 (a) What is the sum of the percentages for these top social media sites? Give your answer as an exact number. Macmillan Learning top social media sites: What percent of Americans aged 12-34 use other social media sites most often? Give your answer as an exact number. other social media sites: do %
- The website Data USA stated that in 2016, Texas had the lowest number of adults with a serious mental illness with an average of M=3.26% of the population affected. The state of Texas wants to test if they have a significantly decreased number of mental illness patients compared with the states with the (n=8) highest level of mental illness found. In 2016 the following states had the highest level of adult patients with mental illness: Arkansas= 5.45%, Montana=5.34%, Vermont=5.32%, Oregon=5.19%, Utah=5.2%, Ohio=5.13, Kentucky=5.25% West Virginia=5.18%. The alpha level for the study was set to α=.05 for the criteria. a. State the hypotheses of the study. b. Find the critical t value for this study c. Compute the one-sample t test. (Again calculate sample SD or s - and get SEM before calculating t.) d. Compute the Cohen's d for the data (even if not significant) e. State the results - is the sample significantly higher? Do you reject the null hypothesis? Report the t test results in APA…Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good barometer of the overall stock market. On January 31, 2017, 9 of the 30 stocks making up the DJIA increased in price.On the basis of this fact, a financial analyst claims we can assume that 76% of the stocks traded on the New York Stock Exchange (NYSE) went up the same day. A sample of 61 stocks traded on the NYSE that day showed that 43 went up. You are conducting a study to see if the proportion of stocks that went up is significantlysmaller than 76%. You use a significance level of α=0.01α=0.01. For this study, we should use Select an answer 2-SampTInt 2-PropZInt 1-PropZInt T-Test χ²GOF-Test 2-SampTTest 2-PropZTest TInterval ANOVA 1-PropZTest χ²-Test The null and alternative hypotheses would be: H0H0: ? p μ Select an answer > = < ≠ (please enter a decimal) H1H1: ? p μ Select an answer ≠ = > < (Please enter a decimal) The test statistic =…After post-graduate study, Mike found a job as HR analyst in London. Thecompany is currently recruiting Chief Marketing Officer. The HR departmentrecently sent out a knowledge test to the applicants after the initial CVscreening. At this stage of selection, the company does not invite the lowestscoring 30% (the opposite is the highest 70%.) back for the next face-to-faceinterview. According to the historical data, the test scores on this test arenormally distributed and has a mean of 70 with standard deviation of 10. a.What mark (to the nearest whole number) must a candidate achieve inorder to secure an interview? Show your workings.b. Explain the characteristics of standard normal distribution and normaldistribution, respectively.
