A stratified simple random sample was taken with the following results.Excel File: data21-07.xlsStratum (h)PhN1138300.5020020103250.7825030210500.2110025a. Develop an estimate of the population mean for each stratum.Stratum 1138Stratum 2103Stratum 3210b. Develop an approximate 95% confidence interval for the population mean in each stratum (to 4 decimals).Stratum 1124.6801to151.3199Stratum 294.2429 to111.7572Stratum 3192.1261to227.8739c. Develop an approximate 95% confidence interval for the overall population mean (to 4 decimals).132.0445to138.3191

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Answered: A stratified simple random sample was…

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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200 people were randomly sampled and asked what they regularly eat for breakfast or lunch. Each person was identified as either a consumer or a non consumer of high-fiber cereals, and the number of calories consumed at lunch was measured and recorded. These data are summarized below; Consumer of high fiber cereals Non consumer of high fiber cereals η1 =41 η2 = 159 Mean 1 =603 Mean 2 =639 Stanadard deviation 1 = 110 Standard deviation 2 = 141 If the scientist claims that people who eat high fiber cereals for breakfast do consume on average fewer calories for lunch than people who don’t eat high fiber cereals for breakfast, and if it is true, high fiber cereal manufacturer will be able to claim another advantage of eating their products-potential weight reduction for dieter. REQUIRED Are there sufficient evidence at 5% significance level to support the above claim?
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