Please read the scenario attached and provide a step-by-step calculation for answers: iii) Calculate the value of your test Statistic iv) What is your conclusion for this test. Give a reason for your answer
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Please read the scenario attached and provide a step-by-step calculation for answers:
iii) Calculate the value of your test Statistic
iv) What is your conclusion for this test. Give a reason for your answer
Step by step
Solved in 3 steps with 1 images
- What is a sample space?What is meant by the sample space of an experiment?Persons who visit the restroom of a certain fast-food outlet were asked to state their opinion of the quality of the restroom facilities, The following tables show the responses from a sample of 100 persons. Gender of Respondent TotalsMale FemaleQuality ofFacilitiesAbove Average 8 7 15Average 26 24 50Below Average 7 28 35Totals 41 59 100A ?2 test is carried out to determine whether there is an association between the gender of persons and their opinion.i) State appropriate null and alternative hypotheses ii) Determine the critical region of the test at the 1% level of significance iii) Calculate the expected value for Male and below average iv) For a test statistic of 9.825, explain with reason, the conclusion of your test.
- Some researchers in the Statistics department are interested in testing whether or not there is an association between job type and being a regular baker. The team collects a sample of n1 = 428 trade workers, n2 = 831 retail workers and n3 = 245 managerial workers, all from Dublin, and asked them to fill out a short survey about their habits in the kitchen. The team claims that 321 trade workers, 409 retail workers, and 137 managerial workers are regular bakers. What is an appropriate statistical test in this scenario? What are the results of such an analysis? Make clear all steps involved and state your conclusions. Take α = 0.01.The American Society for Microbiology (ASM) and the Soap and Detergent Association (SDA) jointly commissioned two separate studies during 2007, both of which were conducted by Harris Interactive. In one of the studies, 1001 adults were interviewed by telephone and asked about their hand-washing habits. In the other study, the hand-washing behavior of 6076 adults was inconspicuously observed within public restrooms in four U.S. cities. Address the following: a. In the telephone interviews, 921 of the adults said they always wash their hands in public restrooms. Use this result to obtain a point estimate for the proportion of adults who say they always wash their hands in public restrooms. b. Verify that the requirements for constructing a confidence interval for p from part (a) are satisfied. c. Using the results from the telephone interviews, construct and interpret a 95% confidence interval for the proportion of adults who say they always wash their hands in public restrooms. d. Is it…The marketing department of ABC Ltd is interested in assessing whether those people who currently buy cars from a rival do so because they view ABC’s cars as being of poor quality. In carrying out a survey, the marketing department asked 200 people two questions. Firstly, have you purchased a car from ABC in the last month? Secondly, which of the following best describes your view of the quality of cars sold by ABC? The responses to these questions are shown in the Table below. Is there evidence of an association between customers’ purchasing behaviour and their perception of the quality of cars sold by ABC Ltd? Explain your results in terms that would be comprehensible to a manager with little knowledge of statistics.