A sample of 36 observations is selected from a normal population. The sample mean is 49, and the population standard deviation is 5.Conduct the following test of hypothesis using the 0.05 significance level.He: H=50H₁: p 50a. Is this a one- or two-tailed test?O One-tailed testOTwo-tailed testb. What is the decision rule?CheckO Reject Ho if -1.96 < z < 1.96Reject He if z<-1.96 or z> 1.96 e-1. What is the p-value? (Round your z value to 2 decimal places and final answer to 4 decimal places.)p-valuee-2. Interpret the p-value? (Round your z value to 2 decimal places and final answer to 2 decimal places.)There is a% chance of finding a z value this large by sampling error when HQ is truec. What is the value of the test statistic? (Negative amount should be indicated by a minus sign. Round your answer to 2 decimalplaces.)Value of the test statistic

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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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AVOWA OPO. 000 8 C00 ar 000.98 000 S 000.8M 000.0 38.5; sample standard deviation (Sx) = 8; N = 22. 3. Compute a confidence interval (95% interval, 2-tailed) for a mean. Data: sample mean (X) = %3D %3D
Only need part D answered, previous parts were answered earlier
1.Null and alternative hypotheses 2. Test statistic 3.P vaule 4. State conclusion for test 5.Construct confidence interval 6.Does confidence interval support conclusion of test?
mg We want to conduct a hypothesis test of the claim that for middle-aged adults the population mean of their cholesterol levels is more than 193.6 We dI. mg and a standard deviation of 19.5 dL mg choose a random sample of such levels. The sample has a mean of 191.6 dL For each of the following sampling scenarios, choose an appropriate test statistic for our hypothesis test on the population mean. Then calculate that statistic. Round your answers to two decimal places. (a) The sample has size 19, and it is from a normally distributed population with an unknown standard deviation. O z = O t = O It is unclear which test statistic to use. (b) The sample has size 18, and it is from a normally distributed population with a known standard deviation of 19.2. z = t%3D O It is unclear which test statistic to use.
st • Question 14 You wish to test the following claim (Ha) at a significance level of a = 0.002. H.:p = 51.2 H.:p > 51.2 You believe the population is normally distributed, but you do not know the standard deviation. You obtain the following sample of data: data 69 58.6 62.8 sUcfocthis sampls/Repout.answeraccurato three ec
Can you please check my work
Use the following scenario to answer the next 6 questions. An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 30 engines and the mean pressure was 4.8 psi with a standard deviation of 1 psi. If the valve was designed to produce an overall mean pressure of 5.0 psi, is there sufficient evidence at the 10% level of significance that the valve performs below specifications? The appropriate hypothesis test for this scenario is: Group of answer choices right-tailed two-tailed left-tailed
Q2
onsider the following hypothesis test: H 0: 50 H a: > 50 A sample of 70 is used and the population standard deviation is 9. Use the critical value approach to state your conclusion for each of the following sample results. Use = .05. a. With = 52.5, what is the value of the test statistic (to 2 decimals)? Can it be concluded that the population mean is greater than 50?SelectYesNoItem 2 b. With = 51, what is the value of the test statistic (to 2 decimals)? Can it be concluded that the population mean is greater than 50?SelectYesNoItem 4 c. With = 51.8, what is the value of the test statistic (to 2 decimals)? Can it be concluded that the population mean is greater than 50?SelectYesNoItem 6
Use the normal distribution and the given sample results to complete the test of the given hypotheses. Assume the results come from a random sample and use a 5 % significance level. Test Ho : p = 0.3 vs Ha : p < 0.3 using the sample results p = 0.19 with n = 202 Round your answer for the test statistic to two decimal places, and your answer for the p-value to three decimal places. test statistic = i p-value = i

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