Using traditional methods, it takes 10.4 hours to receive a basic driving license. A new license training method using Computer Aided Instruction (CAI) has beenproposed. A researcher used the technique with 23 students and observed that they had a mean of 10.8 hours with a standard deviation of 1.9. A level of significanceof 0.1 will be used to determine if the technique performs differently than the traditional method. Assume the population distribution is approximately normal. Statethe null and alternative hypotheses.E KeypadE TablesKeyboard ShortcutsAnswer"HSubmit AnswerO 2021 Hawkes Learningsearch31°F Clear ^ E%96

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Answered: Using traditional methods, it takes…

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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The time needed for college students to complete a certain maze follows a normal distribution with a mean of 45 seconds. To see if the mean time time (in seconds) is changed by vigorous exercise, we have a group of 51 college students exercise vigorously for 30 minutes and then complete the maze. The sample mean and standard deviation of the collected data is 49.2 seconds and 6.5 seconds respectively. Use these data to perform an appropriate test of hypothesis at 5% level of significance. Use p-value approach. A. State the null and the alternative hypotheses. B. Select the appropriate inference procedure and verify conditions for using it. Calculate the value of the test statistic. C. Calculate the p-value. D. State the test decision and conclusion.
The heights of English men are normally distributed with a mean of 69.2 inches and a standard deviation of 4 inches. According to the empirical rule, what percentage of English men are Under 57.2 inches tall?
The diameter of a mason jar is 3 inches but can be as large as 3.05 inches and as small as 2.95 inches. Twenty-five samples of mason jars are taken and it is discovered that these components have a grand mean of 3.01 inches and a standard deviation of 0.03 inches. What is the Cpk value?
Consider a process with Target = 91 , and LSL = 71, and SQL = 8 What is the standard deviation? Give your reasons
For a particular process that is in good statistical control, the mean standard deviation value, sbar, is 0.162. Calculate the estimate for the population standard deviation (the Shewhart standard deviation) if the sample size is 3.
CNN/Money reports that the mean cost of a speeding ticket, including court fees, was $150.00 in 2002. Alocal police department claims that this amount has increased. To test their claim, they collect data from asimple random sample of 160 drivers who have been fined for speeding in the last year, and find that theypaid a mean of $154.00 per ticket. Assuming that the population standard deviation is $17.54, is theresufficient evidence to support the police department’s claim at the ? = 0.01 significance level?
In a test of the effectiveness of garlic for lowering cholesterol, 36 subjects were treated with raw garlic. Cholesterol levels were measured before and after the treatment. The changes (before minus after) in their levels of LDL cholesterol (in mg/dL) have a mean of 0.7 and a standard deviation of 23.1. Use a 0.01 significance level to test the claim that with garlic treatment, the mean change in LDL cholesterol is greater than 0. What do the results suggest about the effectiveness of the garlic treatment? Assume that a simple random sample has been selected. Identify the null and alternative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claim.
An engineer designed a valve that will regulate water pressure on an automobile engine. The engineer designed the valve such that it would produce a mean pressure of 5.5 pounds/square inch. It is believed that the valve performs above the specifications. The valve was tested on 24 engines and the mean pressure was 5.7 pounds/square inch with a variance of 0.49. A level of significance of 0.01 will be used. Assume the population distribution is approximately normal. Make the decision to reject or fail to reject the null hypothesis. Dain
In a test of the effectiveness of garlic for lowering cholesterol, 64 subjects were treated with raw garlic. Cholesterol levels were measured before and after the treatment. The changes (before minus after) in their levels of LDL cholesterol (in mg/dL) have a mean of 0.4 and a standard deviation of 23.9. Use a 0.05 significance level to test the claim that with garlic treatment, the mean change in LDL cholesterol is greater than 0. What do the results suggest about the effectiveness of the garlic treatment? Assume that a simple random sample has been selected. Identify the null and alternative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claim. What are the null and alternative hypotheses? Ο Α. Ho: μ=0 mg/ldL H1: µ > 0 mg/dL B. Ho : μ=0 mg/dL H1: µ0 mg/dL H1: µ<0 mg/dL D. Ho: µ=0 mg/dL H1:µ#0 mg/dL
In a test of the effectiveness of garlic for lowering cholesterol, 81 subjects were treated with raw garlic. Cholesterol levels were measured before and after the treatment. The changes (before minus after) in their levels of LDL cholesterol (in mg/dL) have a mean of 0.9 and a standard deviation of 16.7. Use a 0.01 significance level to test the claim that with garlic treatment, the mean change in LDL cholesterol is greater than 0. What do the results suggest about the effectiveness of the garlic treatment? Assume that a simple random sample has been selected. Identify the null and alternative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claim. What are the null and alternative hypotheses?
In a test of the effectiveness of garlic for lowering cholesterol, 36 subjects were treated with raw garlic. Cholesterol levels were measured before and after the treatment. The changes (before minus after) in their levels of LDL cholesterol (in mg/dL) have a mean of 0.7 and a standard deviation of 2.33. Use a 0.01 significance level to test the claim that with garlic treatment, the mean change in LDL cholesterol is greater than 0. What do the results suggest about the effectiveness of the garlic treatment? Assume that a simple random sample has been selected. Identify the null and alternative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claim.
The common fruit fly Drosophila melanogaster is the most studied organism in genetic research because it is small, is easy to grow, and reproduces rapidly. The length of the thorax (where the wings and legs attach) in a population of male fruit flies is approximately Normal with mean 0.800 millimeters (mm) and standard deviation 0.078 mm. Use software or Table A. (a) What proportion of flies have thorax length less than 0.66 mm? (Enter your answer as a percentage rounded to two decimal places.) 6.18 proportion: Incorrect (b) What proportion of flies have thorax length greater than 0.93 mm? (Enter your answer as a percentage rounded to two decimal places.) 18.41 proportion: Incorrect

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