please answer all parts
Posted: Mon Jul 11, 2022 11:24 am
please answer all parts
Determine the minimum sample size required when you want to be 90% confident that the sample mean is within one unit of the population mean and a = 13.5. Assume the population is normally distributed. A 90% confidence level requires a sample size of (Round up to the nearest whole number as needed.)
Use a t-test to test the claim about the population mean μ at the given level of significance a using the given sample statistics. Assume the population is normally distributed. Claim: μ=51,400; a=0.10 Sample statistics: x=50,681, s=2100, n=18 Click the icon to view the t-distribution table. What are the null and alternative hypotheses? Choose the correct answer below. OA. Ho: #51,400 H₂H=51,400 ỌC Ho N 551,400 H₂ μ>51,400 Ο Β. Η μ251,400 H₂ μ<51,400 (Round to two decimal places as needed.) OD. H=51,400 H₂ μ#51,400 What is the value of the standardized test statistic? The standardized test statistic is What is(are) the critical value(s)? The critical value(s) is (are). (Round to three decimal places as needed. Use a comma to separate answers as needed.) Decide whether to reject or fail to reject the null hypothesis. OA Fall to reject Ho. There is enough evidence to reject the claim.
In a random sample of 27 people, the mean commute time to work was 31.5 minutes and the standard deviation was 7.3 minutes. Assume the population is normally distributed and use a t-distribution to construct a 95% confidence interval for the population mean u. What is the margin of error of u? Interpret the results. The confidence interval for the population mean u is (Round to one decimal place as needed.) The margin of error of u is (Round to one decimal place as needed.) Interpret the results. OA. With 95% confidence, it can be said that the population mean commute time is between the bounds of the confidence interval. B. It can be said that 95% of people have a commute time between the bounds of the confidence interval. C. If a large sample of people are taken approximately 95% of them will have commute times between the bounds of the confidence interval. OD. With 95% confidence, it can be said that the commute time is between the bounds of the confidence interval.
C -k c M Test the claim about the population mean, u, at the given level of significance using the given sample statistics. Claim: μ = 30; x = 0.09; a=3.24. Sample statistics: x= 29.6, n = 70 OA. Ho: μ=30 Ha: μ#30 OC. Ho: μ#30 Ha: H=30 OE. Ho: <30 H₂: H=30 Calculate the standardized test statistic. The standardized test statistic is (Round to two decimal places as needed.) OB. Ho: >30 H₂:μ=30 OD. Ho: H=30 H₂:μ>30 OF. Ho: H=30 Ha: μ< 30 Determine the critical value(s). Select the correct choice below and fill in the answer box to complete your choice. (Round to two decimal places as needed.) A. The critical values are t B. The critical value is Determine the outcome and conclusion of the test. Choose the correct answer below.
A researcher wishes to estimate, with 95% confidence, the population proportion of adults who support labeling legislation for genetically modified organisms (GMOs). Her estimate must be accurate within 4% of the true proportion. (a) No preliminary estimate is available. Find the minimum sample size needed. (b) Find the minimum sample size needed, using a prior study that found that 84% of the respondents said they support labeling legislation for GMOs: (c) Compare the results from parts (a) and (b). (a) What is the minimum sample size needed assuming that no prior information is available? (Round up to the nearest whole number as needed.) (b) What is the minimum sample size needed using a prior study that found that 84% of the respondents support labeling legislation? n=(Round up to the nearest whole number as needed.) (c) How do the results from (a) and (b) compare? S no AOA. Having an estimate of the population proportion has no effect on the minimum sample size needed. B. Having an estimate of the population proportion raises the minimum sample size needed. C. Having an estimate of the population proportion reduces the minimum sample size needed.
For the following information, determine whether a normal sampling distribution can be used, where p is the population proportion, a is the level of significance, p is the sample proportion, and n is the sample size. If it can be used, test the claim. Claim: p>0.64; a = 0.06. Sample statistics: p=0.72, n=325 be used here, since 5 and Let q=1-p and let q=1-p. A normal sampling distribution If a normal sampling distribution can be used, identify the hypotheses for testing the claim. Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. OA. Ho: PsH:p> OB. Ho: P=H₂P* OC. Ho: P> Hips OD. Ho: pz.H₂: p< OE HP<H₂ pz OF. HP.H₂p= OG. A normal sampling distribution cannot be used. (Round to two decimal places as needed.) (Round to two decimal places as needed.) (Round to two decimal places as needed.). (Round to two decimal places as needed.) (Round to two decimal places as needed.) (Round to two decimal places as needed.) 5. If a normal sampling distribution can be used, identify the critical value(s) for this test. Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
O A. Zo (Round to two decimal places as needed. Use a comma to separate answers as needed.) OB. A normal sampling distribution cannot be used. If a normal sampling distribution can be used, identify the rejection region(s). Select the correct choice below and, if necessary, fill in the answer box(es) to complete your choice. OA. The rejection region is z< (Round to two decimal places as needed.) B. The rejection region is z> (Round to two decimal places as needed.) <2< (Round to two decimal places as needed.) OC. The rejection region is OD. The rejection regions are z< and z> (Round to two decimal places as needed.) OE. A normal sampling distribution cannot be used.
=OA Z= If a normal sampling distribution can be used, identify standardized test statistic z. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. (Round to two decimal places as needed.) B. A normal sampling distribution cannot be used. A If a normal sampling distribution can be used, decide whether to reject or fail to reject the null hypothesis and interpret the decision. Choose the correct answer below. S OA. Reject the null hypothesis. There is not enough evidence to support the claim. OB. Reject the null hypothesis. There is enough evidence to support the claim. OC. Fail to reject the null hypothesis. There is not enough evidence to support the claim. OD. Fail to reject the null hypothesis. There is enough evidence to support the claim OE. A normal sampling distribution cannot be used. C T
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Use a t-test to test the claim about the population mean μ at the given level of significance a using the given sample statistics. Assume the population is normally distributed. Claim: μ=51,400; a=0.10 Sample statistics: x=50,681, s=2100, n=18 Click the icon to view the t-distribution table. What are the null and alternative hypotheses? Choose the correct answer below. OA. Ho: #51,400 H₂H=51,400 ỌC Ho N 551,400 H₂ μ>51,400 Ο Β. Η μ251,400 H₂ μ<51,400 (Round to two decimal places as needed.) OD. H=51,400 H₂ μ#51,400 What is the value of the standardized test statistic? The standardized test statistic is What is(are) the critical value(s)? The critical value(s) is (are). (Round to three decimal places as needed. Use a comma to separate answers as needed.) Decide whether to reject or fail to reject the null hypothesis. OA Fall to reject Ho. There is enough evidence to reject the claim.
In a random sample of 27 people, the mean commute time to work was 31.5 minutes and the standard deviation was 7.3 minutes. Assume the population is normally distributed and use a t-distribution to construct a 95% confidence interval for the population mean u. What is the margin of error of u? Interpret the results. The confidence interval for the population mean u is (Round to one decimal place as needed.) The margin of error of u is (Round to one decimal place as needed.) Interpret the results. OA. With 95% confidence, it can be said that the population mean commute time is between the bounds of the confidence interval. B. It can be said that 95% of people have a commute time between the bounds of the confidence interval. C. If a large sample of people are taken approximately 95% of them will have commute times between the bounds of the confidence interval. OD. With 95% confidence, it can be said that the commute time is between the bounds of the confidence interval.
C -k c M Test the claim about the population mean, u, at the given level of significance using the given sample statistics. Claim: μ = 30; x = 0.09; a=3.24. Sample statistics: x= 29.6, n = 70 OA. Ho: μ=30 Ha: μ#30 OC. Ho: μ#30 Ha: H=30 OE. Ho: <30 H₂: H=30 Calculate the standardized test statistic. The standardized test statistic is (Round to two decimal places as needed.) OB. Ho: >30 H₂:μ=30 OD. Ho: H=30 H₂:μ>30 OF. Ho: H=30 Ha: μ< 30 Determine the critical value(s). Select the correct choice below and fill in the answer box to complete your choice. (Round to two decimal places as needed.) A. The critical values are t B. The critical value is Determine the outcome and conclusion of the test. Choose the correct answer below.
A researcher wishes to estimate, with 95% confidence, the population proportion of adults who support labeling legislation for genetically modified organisms (GMOs). Her estimate must be accurate within 4% of the true proportion. (a) No preliminary estimate is available. Find the minimum sample size needed. (b) Find the minimum sample size needed, using a prior study that found that 84% of the respondents said they support labeling legislation for GMOs: (c) Compare the results from parts (a) and (b). (a) What is the minimum sample size needed assuming that no prior information is available? (Round up to the nearest whole number as needed.) (b) What is the minimum sample size needed using a prior study that found that 84% of the respondents support labeling legislation? n=(Round up to the nearest whole number as needed.) (c) How do the results from (a) and (b) compare? S no AOA. Having an estimate of the population proportion has no effect on the minimum sample size needed. B. Having an estimate of the population proportion raises the minimum sample size needed. C. Having an estimate of the population proportion reduces the minimum sample size needed.
For the following information, determine whether a normal sampling distribution can be used, where p is the population proportion, a is the level of significance, p is the sample proportion, and n is the sample size. If it can be used, test the claim. Claim: p>0.64; a = 0.06. Sample statistics: p=0.72, n=325 be used here, since 5 and Let q=1-p and let q=1-p. A normal sampling distribution If a normal sampling distribution can be used, identify the hypotheses for testing the claim. Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. OA. Ho: PsH:p> OB. Ho: P=H₂P* OC. Ho: P> Hips OD. Ho: pz.H₂: p< OE HP<H₂ pz OF. HP.H₂p= OG. A normal sampling distribution cannot be used. (Round to two decimal places as needed.) (Round to two decimal places as needed.) (Round to two decimal places as needed.). (Round to two decimal places as needed.) (Round to two decimal places as needed.) (Round to two decimal places as needed.) 5. If a normal sampling distribution can be used, identify the critical value(s) for this test. Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
O A. Zo (Round to two decimal places as needed. Use a comma to separate answers as needed.) OB. A normal sampling distribution cannot be used. If a normal sampling distribution can be used, identify the rejection region(s). Select the correct choice below and, if necessary, fill in the answer box(es) to complete your choice. OA. The rejection region is z< (Round to two decimal places as needed.) B. The rejection region is z> (Round to two decimal places as needed.) <2< (Round to two decimal places as needed.) OC. The rejection region is OD. The rejection regions are z< and z> (Round to two decimal places as needed.) OE. A normal sampling distribution cannot be used.
=OA Z= If a normal sampling distribution can be used, identify standardized test statistic z. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. (Round to two decimal places as needed.) B. A normal sampling distribution cannot be used. A If a normal sampling distribution can be used, decide whether to reject or fail to reject the null hypothesis and interpret the decision. Choose the correct answer below. S OA. Reject the null hypothesis. There is not enough evidence to support the claim. OB. Reject the null hypothesis. There is enough evidence to support the claim. OC. Fail to reject the null hypothesis. There is not enough evidence to support the claim. OD. Fail to reject the null hypothesis. There is enough evidence to support the claim OE. A normal sampling distribution cannot be used. C T