3. A consumer advocacy group suspects that a local supermarket's 500 grams of sugar actually weigh less than 500 grams. The group took a random sample of 20 such packages, weigh each one, and found the mean weight for the sample to be 496 grams with a standard deviation of 8 grams. Using 10% significance level, would you conclude that the mean weight is less than 500 grams? Also, find the 90% confidence interval of the true mean. Solution: Step 1: State the hypotheses. H Step 2: The level of significance and critical region. a = df = and t Step 3: Compute for the value of one sample t test. tempand =, Step 4: Decision rule. Step 5: Conclusion. Step 6: Confidence interval.

3. A consumer advocacy group suspects that a local supermarket's 500 grams of sugar actually weigh less than 500 grams. The group took a random sample of 20 such packages, weigh each one, and found the mean weight for the sample to be 496 grams with a standard deviation of 8 grams. Using 10% significance level, would you conclude that the mean weight is less than 500 grams? Also, find the 90% confidence interval of the true mean. Solution: Step 1: State the hypotheses. H Step 2: The level of significance and critical region. a = df = and t Step 3: Compute for the value of one sample t test. tempand =, Step 4: Decision rule. Step 5: Conclusion. Step 6: Confidence interval.

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Description: 3. A consumer advocacy group suspects that a local supermarket's 500 grams of sugaractually weigh less than 500 grams. The group took a random sample of 20 suchpackages, weigh each one, and found the mean weight for the sample to be 496 gramswith a

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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