Results from a civil servant exam are shown in the table to the right. Is there sufficient evidence to support the claim that the results from the test are discriminatory? Use a 0.05 significance level.
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Q: Explain Misconceptions about significance testing?
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A: The provided information are:
Q: Explain the difference between a one-tailed and two-tailed significance test. When is it appropriate…
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A: It needed to test whether results from the civil servant exam are discriminatory.
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A: We have given that Sample Proportion 1 (\hat p_1)(p^1) = 0.50940.5094 Favorable Cases 1…
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- What is meant by the sample space of an experiment?hen conducting the hypothesis test a P-value of .0192was calculated. With a significance level(α)of .05, should the null hypothesis be rejected, or does it fail to reject? a)Reject b) Fail to RejectIn a Privacy Filters poll, 806 were asked to identify their favorite seat when they fly, and 435 of them chose the window seat. Use a 0.01 significance level to test the claim that more than 50% of adults prefer window seats when they fly. a) State the null and alternative hypothesis. b) Test Statistics c) P-value approach d) Conclusion
- A grassroots group opposed to a proposed increase in the gas tax claimed that the increase would hurt working-class people the most, since they commute the farthest to work. Suppose that the group randomly surveyed 24 individuals and asked them their daily one-way commuting mileage. The results are in Table below. Using a 5% significance level, test the hypothesis that the three mean commuting mileages are the same. working-class professional (middle incomes) professional (wealthy) 17.8 16.5 8.5 26.7 17.4 6.3 49.4 22.0 4.6 9.4 7.4 12.6 65.4 9.4 11.0 47.1 2.1 28.6 19.5 6.4 15.4 51.2 13.9 9.3An information technology help desk has a service level agreement (SLA) that says that clients should be contacted about their service requests within 1 hour (60 minutes) of the help desk receiving the request. Jackie, the help desk manager, wants to check if the help desk is actually taking longer than 60 minutes to respond. For a random sample of 20 service requests, Jackie obtained the time between the help desk receiving the request and the client being contacted. The marketer conducts a one-mean hypothesis at the 5% significance level, to test whether the response time is greater than 60 minutes. (a) Which answer choice shows the correct null and alternative hypotheses for this test? Select the correct answer below: H0:μ=20; Ha:μ<20, which is a left-tailed test. H0:μ=60; Ha:μ<60, which is a left-tailed test. H0:μ=20; Ha:μ>20, which is a right-tailed test. H0:μ=60; Ha:μ>60, which is a right-tailed test.Christina, a restaurant manager, would like to make the claim that the average number of customers that her restaurant serves per hour is more than 57. Christina samples 29 hours over the course of a week and records the number of customers served and obtains a sample mean of 62 customers per hour. At the 2.5% significance level, should Christina reject or fail to reject the null hypothesis given the sample data below? H0:μ=57 customers; Ha:μ>57 customers α=0.025 (significance level) test statistic=2.61 Use the graph below to select the type of test (left-, right-, or two-tailed). Then set the α and the test statistic to determine the p-value. Use the results to determine whether to reject or fail to reject the null hypothesis. Alternatively, use the table below to find the p-value: z 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 2.6 0.995 0.995 0.996 0.996 0.996 0.996 0.996 0.996 0.996 0.996 2.7 0.997 0.997 0.997 0.997 0.997 0.997 0.997 0.997 0.997 0.997 2.8…
- In a studyy of smokers who tried to quit smoking with nicotine patch therapy, 39 were smoking one year after the treatment, and 32 were not smoking one year after the treatment. We want to use a 0.05 significance level to test the claim that among smokers who try to quit with nicotine patch therapy, the majority are smoking a year after the treatment. a) What is the null hypothesis? b) What is the alternative hypothesis? c) What is the value of the standard score for the sample proportion? d) What is the P-value? e) Describe a type I error for this test. f) Describe a type II error for this test.Determine whether the alternative hypothesis is supported at a 0.05 significance level. would B be correct?dults aged 18 years old and older were randomly selected for a survey on obesity. Adults are considered obese if their body mass index (BMI) is at least 30. The researchers wanted to determine if the proportion of southern women who are obese is less than the proportion of southern men who are obese. The results are shown in the table below. Test at the 1% level of significance. Number who are obese Sample size Men 42,773 155,525 Women 67,176 248,775 a.State the distribution to use for the test. (Round your answers to five decimal places. b. What is the test statistic c. Conduct a Hypothesis Test
- In the previous year, 40% of women over the age of fifty had regularly scheduled mammograms. Following last year's test, a campaign was initiated to encourage women to be tested regularly. This year, a cancer research group surveys a random sample of 450 women, and 195 respond affirmatively. With a 5% significance level, test to see if the campaign was effective. What is the null hypothesis? options: H0: μ ≤ 0.4 H0: μ ≥ 0.4 H0: p ≠ 0.4 H0: p ≥ 0.4 H0: p ≤ 0.4 H0: μ ≠ 0.4 None of these.In a recent poll, 810 adults were asked to identify their favorite seat when they fly, and 495 of them chose a window seat. Use a 0.01 significance level to test the claim that the majority of adults prefer window seats when they fly. Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final conclusion that addresses the original claim. Which of the following is the hypothesis test to be conducted? A. H0: p>0.5 H1: p=0.5 B. H0: p≠0.5 H1: p=0.5 C. H0: p=0.5 H1: p>0.5 D. H0: p<0.5 H1: p=0.5 E. H0: p=0.5 H1: p≠0.5 F. H0: p=0.5 H1: p<0.5 What is the test statistic? z= (Round to two decimal places as needed.) What is the P-value? P-value= (Round to four decimal places as needed.) What is the conclusion about the null hypothesis? A. Reject the null hypothesis in favor of the alternative hypothesis because the p-value is greater than…