Calculate the left and right chi square values, then give the confidence interval.Sample Standard Deviation s = 31Confidence Level c = 0.90 and Sample Size n = 21and XR%3D%3DAt the 90 % level of confidence the population standard deviation is betweenand(Round all answers to 3 decimal places)

Given that: The value of n=21. The value of s=31. As the confidence level is 0.90. The value of α is…

Answered: Calculate the left and right chi square…

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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Hospital Noise Levels Noise levels at various area urban hospitals were measured in decibels. The mean noise level in 165 ward areas was 55.7decibels, and the population standard deviation is 5.5. Find the 99% confidence interval of the true mean. Round your answers to at least one decimal place. < μ <
Hospital Noise Levels Noise levels at various area urban hospitals were measured in decibels. The mean noise level in 170 ward areas was 51.6 decibels, and the population standard deviation is 5.2. Find the 95% confidence interval of the true mean. Round your answers to at least one decimal place.
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STATISTICS AND PROBABILITY (Please write the solution legibly. Rate will be given) Manila Rattan Chairs and tables claims that the average number of chairs rented for a party is 240 chairs. A sample of 25 rentals has an average of 234 chairs with a standard deviation of 22. At an alpha of 0.01, is there enough evidence to say that the average number of chairs rented for party in MRC is lesser than their claim? (Please use the traditional approach: Step 1: State the null and alternative hypotheses Step 2: Select a level of significance Step 3: Select the test statistics Step 4: State the decision rule Step 5: Compute the value of the test statistics Step 6: Make a decision)
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nework: Chap A random sample of 25 items is drawn from a population whose standard deviation is unknown. The sample mean is x = 850 and the sample standard deviation is s= 15. Use Appendix D to find the values of Student's t. (a) Construct an interval estimate of u with 95% confidence. (Round your answers to 3 decimal places.) The 95% confidence interval is from to (b) Construct an interval estimate of u with 95% confidence, assuming that s 30. (Round your answers to 3 decimal places.) The 95% confidence interval is from to (c) Construct an interval estimate of u with 95% confidence, assuming that s = 60. (Round your answers to 3 decimal places.) The 95% confidence interval is from to (d) Describe how the confidence interval changes as s increases. The interval stays the same as s increases. The interval gets wider as s increases. O The interval gets narrower as s increases.
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