Consider the following hypothesis test:Ho: μ < 50Ha: μ > 50A sample of 60 is used and the population standard deviation is 8. Use the critical value approach to state your conclusion for each of the following sample results. Use a = 0.05.Note: In the following questions, if the correct option is "Reject Ho" select "option 1". If "Do not reject Ho" is correct, then select "option 2".=.= 52.5- Select your answer - ✓D. = 51- Select your answer - ✓=.= 51.8- Select your answer -

Answer The population mean = 50The sample size = 60The population standard deviation = 8

Answered: Ho : μ < 50 Ha: μ> 50 tion standard…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

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You may need to use the appropriate appendix table or technology to answer this question. At Western University the historical mean of scholarship examination scores for freshman applications is 900. A historical population standard deviation = 180 is assumed known. Each year, the assistant dean uses a sample of applications to determine whether the mean examination score for the new freshman applications has changed. (a) State the hypotheses. OH₂H ≤ 900 H₂:μ > 900 H:μ ≥ 900 H: μ 900 H:μs 900 (b) What is the 95% confidence interval estimate of the population mean examination score if a sample of 190 applications provided a sample mean x = 933? (Round your answers to the nearest integer.) to (c) Use the confidence interval to conduct a hypothesis test. Using a = 0.05, what is your conclusion? O Reject H. There is sufficient evidence to conclude that the mean examination score for the new freshman applications has changed. O Reject H. There is insufficient evidence to conclude that the…
The time needed for college students to complete a certain paper and pencil maze follows a Normal distribution, with a mean of 80 seconds and a standard deviation of 6 seconds. You wish to see if the mean time is changed by meditation, so you have a group of 8 college students meditate for 30 minutes and then complete the maze. It takes them an average of = 74 seconds to complete the maze. Use this information to test the hypotheses H 0: = 80, H a: 80 at significance level = 0.02. You conclude that: a. H0 should not be rejected. b. Ha should be accepted. c. H0 should be rejected. d. this is a borderline case and no decision should be made. The scores on the Wechsler Adult Intelligence Scale are approximately Normal, with = 100 and = 11. The proportion of adults with scores above 110 is closest to: a. 0.14. b. 0.25. c. 0.33. d. 0.18.
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An IQ test is designed so that the mean is 100 and the standard deviation is 24 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 95% confidence that the sample mean is within 8 IQ points of the true mean. Assume tha σ=24 and determine the required sample size using technology. Then determine if this is a reasonable sample size for a real world calculation.The required sample size is enter your response here. (Round up to the nearest integer.) Would it be reasonable to sample this number of students? Yes. This number of IQ test scores is a fairly small number. No. This number of IQ test scores is a fairly small number. Yes. This number of IQ test scores is a fairly large number. No.This number of IQ test scores is a fairly large number.
A sample is selected from a population withu = 50. After a treatment is administered to the 16 individuals in the sample, the mean is found to be M = 55 and the standard deviation is s = 8, What is the test statistic for the sample mean?
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Currently patrons at the library speak at an average of 69 decibels. Will this average decline after the installation of a new computer plug in station? After the plug in station was built, the librarian randomly recorded 41 people speaking at the library. Their average decibel level was 67 and their standard deviation was 5. What can be concluded at the the a = 0.01 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ? v| Select an answer v H1: ? v Select an answer v c. The test statistic ? v = (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is ? v a f. Based on this, we should Select an answer v the null hypothesis. g. Thus, the final conclusion is that ... O The data suggest the populaton mean has significantly decreased from 69 at a = 0.01, so there is statistically significant evidence to conclude that the population mean decibel…
Biological oxygen demand (BOD) is a pollution index that is monitored in the treated effluent of paper mills. A certain paper mill has taken 31 samples over the past 3 months. The mean and standard deviation for the sample data are 3.42 and 0.728 ppm respectively. The mill would like to see if this sample indicates that the true average BOD in their treated effluent exceeds the targeted 3.00 ppm. Let ? = 0.05. A) The test statistic, (ttest), for this data set is: Note: Round your answer to the nearest hundredth.B) The p-value is: C) The statistical decision and corresponding English interpretation for this study are: Fail to reject Ha: conclude that the true BOD in treated effluent exceeds 3 ppmFail to reject Ho: we cannot conclude that the true BOD in treated effluent exceeds 3 ppm Reject Ha: we cannot conclude that the true BOD in treated effluent exceeds 3 ppmReject Ho: conclude that the true BOD in treated effluent exceeds 3 ppm
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Ho : μ < 50 Ha: μ> 50 tion standard deviation is 8. Use the critical value approach to state your conclusion for each of the following sample results. Use e correct option is "Reject Ho" select "option 1". If "Do not reject Ho" is correct, then select "option 2".