Four scenarios of statistical studies are given below. Decide which study uses a samplestatistic.A) An estimated 15% of Americans don't use the internet.B) Parkland Hospital performs 15,000 births a year. Of 1000 subjects in a study onmultiple births, 38 gave birth to twins.). A poll of the entire student body found that 32% of students at Wilson AbnerCollege voted in the last presidential election.D) In 2001, 78% of children diagnosed with cancer were in remission after five years,and this number is improving.

In options A, C, D they have considered the entire population.

Answered: Four scenarios of statistical studies…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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According to the Federal Trade Commission report on consumer fraud and identity theft, 23% of all complaints in 2007 were for identity theft. This year, a certain state kept track of how many of its 1380 complaints were for identity theft. They want to know if the data provide enough evidence to show that this state had a different proportion of identity theft than 23%. State the sample statistic, population parameter, and hypotheses.a) The sample statistic in context is: Select an answer A randomly selected complaint filed with the FTC for that state. The percentage of 1380 randomly selected complaints filed with the FTC for that state that are for identity theft. The percentage of all complaints filed with the FTC for that state that are for identity theft. The mean number of all complaints filed with the FTC for that state that are for identity theft. The mean number of 1380 randomly selected complaints filed with the FTC for that state that are for identity theft. A randomly…
Difference tests are conducted to determine: A. the representative value in a given set of scores. B. whether two or more groups differ on an outcome. C. if the assumptions of a statistical procedure have been met. D. whether two variables correlate with each other.
The city council of Pine Bluffs is considering increasing the number of police in an effort to reduce crime. Before making a final decision, the council asked the chief of police to survey other cities of similar size to determine the relationship between the number of police and the number of crimes reported. The chief gathered the following sample information. City Oxford Starksville Danville Athens ……….... Police 23 24 30 33 Number of Crimes 18 15 Click here for the Excel Data File 9 11 Number of crimes City Holgate Carey Whistler Woodville > Answer is complete but not entirely correct. 40.6081 X (90.0408) ► x Answer is complete and correct. 19✔ Police 24 20 19 27 a. Determine the regression equation. (Negative amounts should be indicated by a minus sign. Round your answers to 4 decimal places.) Number of Crimes 9 22 24 10 b. Estimate the number of crimes for a city with 21 police officers. (Round your answer to the nearest whole number.)
Kindly assist with creating bar charts, or pie charts for the below results; The results of this study were based on interviews issued and completed by eleven (11) employees at the Hotel. This research study comprised 31.4% of the total workforce across the three departments, with a total of 35 employees who varied in age from 16 years to above 65 years. 63.6% of individuals who participated were female, while 36% were male. The interviews included participation from 30% of employees in the housekeeping department, 33% from Guest Services, and 31% from the Food and Beverage department. There is a higher representation of females across all departments, with a total of 7 females compared to 4 males. There is a range of tenure lengths, with some employees having just started (1 year) and others having been with the hotel for longer periods (up to 14.5 years).
You may need to use the appropriate technology to answer this question. Suppose a company surveyed the work preferences and atitudes of 1,006 working adults spread over three generations: baby boomers, Generation X, and millennials. In one question, individuals were asked if they would leave their current job to make more money at another Job. The sample data are summarized in the following table. Generation Leave Job for More Money? Baby Boomer Generation X Millennial Yes 124 154 167 No 202 185 174 Conduct a test of independence to determine whether interest in leaving a current job for more money is independent of employee generation State the null and aiternative hypotheses Hg Interest in leaving job for more money is independent of the employee generation H, Interest in leaving job for more money is not independent of the employee generation. OH Interest in leaving job for mere money is mutually excusive of the employee generation H, Interest in leaving job for more money is not…
). You are interested in investigating if there a difference in mean cholesterol between the four diet groups. What kind of sample and outcome is this?
1. If you wanted to conduct a survey to determine the mean shoe size of American adults, how could you collect the data to ensure that you had a simple random sample?
Sample surveys on sensitive issues can give different results depending on how the question is asked. A University of Wisconsin study randomly divided 2400 respondents into three groups. All participants were asked if they had ever used cocaine. One group of 800 was interviewed by phone; 21% said they had used cocaine. Another 800 people were asked the question in a one-on-one personal interview; 25% said “Yes.” The remaining 800 were allowed to make an anonymous written response; 28% said “Yes.”101. Was this an experiment or an observational study? Justify your answer.2. Make a two-way table of responses about cocaine use by how the survey was administered.3. Are the differences between the three groups statistically significant? Give appropriate evidence to support your answer
International experience around the world is important in our culture of globalization. According to NAFSA, 54.5% of all American students traveling abroad went to Europe in the 2014-2015 academic year. To determine if there is shift in the proportion of students traveling to Europe, suppose a random sample of 300 students who had studied abroad was taken for the 2015-2016 school year. One-hundred sixty of the students traveled to Europe. a. Conduct a test to determine if the proportion of students traveling to Europe has changed. Be sure to provide a complete write-up. b. Based on the hypothesis test, would you expect 0.545 to be in confidence interval for the proportion? Explain without constructing the interval.
1. A scientist is studying the effect of exercise on blood pressure. He studies 50 people who exercise regularly to find out whether their blood pressures are low, average, or high. This is an example of a(n): Answer choices: sample survey. observational study. experiment.
Sierra College students enrolled in an online Elementary Statistics course were asked to participate in an anonymous onlne survey. The survey asked the students "Which type of device will you primarily use to access your online course in Canvas?". Of the 152 students who answered this question, 20 responded "a desktop computer", 121 responded "a laptop computer", 6 responded "a smartphone", and 5 responded "a tablet". The Sierra College Mathematics Department believes that less than 5% of students enrolled in an online Elementary Statistics course primarily uses a smartphone to access their online course in Canvas. Use the data collected in the survey to conduct a hypothesis testing procedure to test this belief. What conclusion should be reached according to the results of this hypothesis test?
The Wall Street Journal Corporate Perceptions Study 2011 surveyed readers and asked how each rated the quality of management and the reputation of the company for over 250 worldwide corporations. Both the quality of management and the reputation of the company were rated on an excellent, good, and fair categorical scale. Assume the sample data for 200 respondents below applies to this study. Quality of Management Reputation of Company Excellent Good Fair Excellent 40 25 5 Good 35 28 10 Fair 25 17 15 (a) Use a 0.05 level of significance and test for independence of the quality of management and the reputation of the company. State the null and alternative hypotheses. H0: Quality of management is not independent of the reputation of the company.Ha: Quality of management is independent of the reputation of the company. H0: Quality of management is independent of the reputation of the company.Ha: Quality of management is not independent of the…

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