I21-34. What's the design? Read each brief report of statisticalresearch, and identifya) whether it was an observational study or an experiment.If it was an observational study, identify (if possible)b) whether it was retrospective or prospective.c) the subjects studied and how they were selected.d) the parameter of interest.e) the nature and scope of the conclusion the study can reach.If it was an experiment, identify (if possible)b) the subjects studied.c) the factor(s) in the experiment and the number of levels foreach.d) the number of treatments.e) the response variable measured.f) the design (completely randomized, blocked, or matched).g) whether it was blind (or double-blind).h) the nature and scope of the conclusion the experiment canreach.R3.8. People who read the last page of a mystery novel first gen-erally like stories better. Researchers recruited 819 collegestudents to read short stories, and for one story, they weregiven a spoiler paragraph beforehand. On the second andthird story, the spoiler was incorporated as the opening para-graph or not given at all. Overall, participants liked the sto-ries best after first reading spoilers. (Psychological Science,August 12, 2011)

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Answered: | 21-34. What's the design? Read each…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Classify the following sentence as True or False: Repeated testing can alter the effects of a study.
Seattle Grace Medical Center. As part of a long-term study of individuals 65 years of age or older, doctors at the Seattle Grace Medical Center in Washington state investigated the relationship between state of residence and depression. A sample of 60 individuals, all in reasonably good health, was selected; 20 individuals were residents of Texas, 20 were residents of Washington state, and 20 were residents of South Carolina. Each of the individuals sampled was given a standardized test to measure depression. The data collected follow; higher test scores indicate higher levels of depression. These data are contained in the attached data file SeattleGrace1. A second part of the study considered the relationship between state of residence and depression for individuals 65 years of age or older who had a chronic health condition such as diabetes and/or high blood pressure. A sample of 60 individuals with such conditions was identified. Again, 20 were residents of Texas, 20 were residents…
Teacher Salaries. Data on salaries in the public school system are published annually in Ranking of the States and Estimates of School Statistics by the National Education Association. The mean annual salary of (public) classroom teachers is $55.4 thousand. A hypothesis test is to be performed to decide whether the mean annual salary of classroom teachers in Ohio is greater than the national mean. a. determine the null hypothesis. b. determine the alternative hypothesis. c. classify the hypothesis test as two tailed, left tailed, or right tailed.
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. A magazine subscriber study asked, "In the past 12 months, when traveling for business, what type of airline ticket did you purchase most often?" A second question asked if the type of airline ticket purchased most often was for domestic or international travel. Sample data obtained are shown in the following table. Type of Ticket Type of Flight Domestic International First class 29 22 Business class 94 120 Economy class 519 136 Using a 0.05 level of significance, is the type of ticket purchased independent of the type of flight? Find the value of the test statistic. (Round your answer to three decimal places.) Find the p-value. (Round your answer to four decimal places.) p-value =
Question Z The recidivism rate for convicted sex offenders is 11%. A warden suspects that this percent is higher if the sex offender is also a drug addict. Of the 332 convicted sex offenders who were also drug addicts, 50 of them became repeat offenders. What can be concluded at the a = 0.01 level of significance? a. For this study, we should use [z-test for a population proportion b. The null and alternative hypotheses would be: Ho: pv = H₁: pv = (please enter a decimal) (Please enter a decimal) (please show your answer to 3 decimal places.) c. The test statistic z = d. The p-value = e. The p-value is va f. Based on this, we should [Select an answer the null hypothesis. g. Thus, the final conclusion is that ... (Please show your answer to 4 decimal places.) O The data suggest the population proportion is not significantly higher than 11% at a = 0.01, so there is statistically significant evidence to conclude that the population proportion of convicted sex offender drug addicts who…
I have attached the question as a picture. Please if you can section the question in its three parts A, B, and C. Thank you.
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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