Exercise 4: Confidence Intervals for the Population Means using z-valuesA manufacturer of widgets expects that each widget will be 11 inches long (µ= 11 inches). The population standarddeviation (o) is thought to be 0.02 inch. The Sample Mean, X, is 10.998 inches. The sample size is 100.Inputs$Sample Mean (X)Presumed Population Standard Deviation, oSample size (n)10.9980.02 inch1001. What is the point estimate for the population mean, µ?2. What is the appropriate z-value to use when constructing a confidence interval at a 95% and 99%confidence levels? Use the z-value table and Microsoft Excel.Assignment03Page 3 of 5Assignment 3: Chapter 9, 10, 11 & 12Confidencez-Valuez-ValueLevel(Table)(Еxcel)Excel Formula95% (0.90)99% (0.99)=ABS(NORM.S.INV(0.025))=ABS(NORM.S.INV(0.005))3. Using a z-values calculate the confidence interval using at a 95% and 99% confidence levels. Do this byhand and use Excel's CONFIDENCE.NORM function. Report the Margin of Error, Lower ConfidenceLimit, and Upper Confidence Limit. Paste your work from Excel using Word's Paste Special function.X+z-Vn4. What does these confidence intervals you constructed tell you?

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Answered: Exercise 4: Confidence Intervals for…

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 mean number of eggs per person eaten in the United States is 252 and the standard deviation is 68. Do college students eat more than the average? The 45 college students surveyed averaged 281 eggs per person. What can be concluded at the 0.05 level of significance? H0: = 252 Ha: _____________ 252 Test statistic: __________ p-Value =__________ Reject/Fail to reject H0?______________ Conclusion: There is____________ evidence to make the conclusion that the population mean number of eggs consumed college students per year is more than 252 eggs per student per year. p-Value Interpretation: If the mean number of eggs consumed per year for college students is equal to_________ and if another study was done with a new randomly selected group of 45 college students, then there is a ____________ percent chance that the average number of eggs consumed per year for this new sample would be greater than_____________ . Level of significance…
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