The inspection division of the Lee County Weights and Measures Department is interested in estimatingthe population mean of the amount of soft drink that is placed in 2-quart bottles at the local bottling plantof a large nationally known soft-drink company. The bottling plant has informed the inspection divisionthat the population standard deviation for 2-quart bottles is .2 quart. A random sample of 100 2-quartbottles obtained from this bottling plant indicated a sample mean of 1.95 quarts. Is the population meanfilling weight of 2-quarts being maintained by this process? Conduct an appropriate test of hypothesisfor the population mean using an alpha level of .05.Step 1. (4) State the null hypothesis Ho and the alternative hypothesis H1.Step 2. (4) State the level of significance a and the sample size n.Step 3. (4) Determine the appropriate test statistic and sampling distribution.Step 4. (4) Determine the critical value(s) that divide the rejection and nonrejection regions.Step 5. (4) Compute the value of the test statistic.Step 6. (4) Make the statistical decision and state the managerial conclusion in the context of the clabeing tested.

Answered: Image /qna-images/answer/cb406946-26b8-4636-afe4-eda122fc71da.jpg

Answered: The inspection division of the Lee…

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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A professor is concerned that the two sections of college algebra that he teaches are not performing at the same level. To test his claim, he looks at the mean exam score for a random sample of students from each of his classes. In Class 1, the mean exam score for 1515 students is 81.281.2 with a standard deviation of 3.43.4. In Class 2, the mean exam score for 1818 students is 83.883.8 with a standard deviation of 5.95.9. Test the professor’s claim at the 0.100.10 level of significance. Assume that both populations are approximately normal and that the population variances are equal. Let Class 1 be Population 1 and let Class 2 be Population 2. Step 2 of 3 : Compute the value of the test statistic. Round your answer to three decimal places.
A certain prescription medicine is supposed to contain an average of 250 parts per million (ppm) of a certain chemical. If the concentration is higher than this, the drug may cause harmful side effects; if it is lower, the drug may be ineffective. The manufacturer runs a check to see if the mean concentration in a large shipment conforms to the target level of 250 ppm or not. A simple random sample of 100 portions is tested, and the sample mean concentration is found to be 247 ppm. The sample concentration standard deviation is s = 12 ppm. Suppose that the p-value was 0.0259. What is the appropriate conclusion to make if α = 0.05? Group of answer choices Fail to reject H0. We have insufficient evidence to conclude that the mean concentration is different from 250 ppm. Fail to reject H0. We have sufficient evidence to conclude that the mean concentration is less than 250 ppm. Reject H0. We have insufficient evidence to conclude that the mean concentration is less than 250…
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A certain prescription medicine is supposed to contain an average of 250 parts per million (ppm) of a certain chemical. If the concentration is higher than this, the drug may cause harmful side effects; if it is lower, the drug may be ineffective. The manufacturer runs a check to see if the mean concentration in a large shipment conforms to the target level of 250 ppm or not. A simple random sample of 100 portions is tested, and the sample mean concentration is found to be 247 ppm. The sample concentration standard deviation is s = 12 ppm. What are the appropriate null and alternative hypotheses? Group of answer choices H 0: x̄ = 250 vs. H a: x̄ < 250 H 0: x̄ = 250 vs. H a: x̄ ≠ 250 H 0: x̄ = 250 vs. H a: x̄ > 250 H 0: μ = 250 vs. H a:μ < 250 H 0: μ = 250 vs. H a: μ ≠ 250 H 0: μ = 250 vs. H a: μ > 250

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