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er product companies, % foreign revenue: X,; n, = 17 30.5 28.0 34.2 50.3 11.1 28.8 40.0 44.9 40.7 60.1 23.1 21.3 42.8 18.0 36.9 28.0 32.5 a. Determine the mean and sample standard deviation (s) for x,. b. Determine the mean and sample standard deviation (s) for x,. c. Find an 85% confidence interval for the difference of means. d. What does this mean in the context of the problem (do tech companies have a greate percentage foreign revenue than basic consumer product companies)?

er product companies, % foreign revenue: X,; n, = 17 30.5 28.0 34.2 50.3 11.1 28.8 40.0 44.9 40.7 60.1 23.1 21.3 42.8 18.0 36.9 28.0 32.5 a. Determine the mean and sample standard deviation (s) for x,. b. Determine the mean and sample standard deviation (s) for x,. c. Find an 85% confidence interval for the difference of means. d. What does this mean in the context of the problem (do tech companies have a greate percentage foreign revenue than basic consumer product companies)?

MATLAB: An Introduction with Applications
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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Means E Ayalnesh Antokhin - Day 68 Diff x + ocs.google.com/document/d/1P8K-jQT4AwuMFwVpFSsuVBig5j36v5ZanP-Z99UG6W/edit Netflix h Hulu Disney+ | * Lakewood Infinite Campus JSTOR okhin - Day 68 Difference of Means Practice ☆回 Insert Format Tools Add-ons Help Last edit was seconds ago 100% Normal text Calibri - - 14 BIUA 川, 三三▼… 7. For large U.S. companies, what percentage of their total income comes from foreign sales? A random sample of technology companies (IBM, Hewlett-Packard, Intell, and others) gave the following information: Technology companies, % foreign revenue: x,; n, = 16 52.8 55.7 47.0 59.6 55.3 41.0 65.1 51.1 53.4 50.8 48.5 44.6 49.4 61.2 39.3 41.8 Another independent random sample of basic consumer product companies (Goodyear, Sarah Lee, H.J. Heinz, Toys 'R' Us) gave the following information: Basic consumer product companies, % foreign revenue: x,; n, = 17 28.0 30.5 34.2 50.3 11.1 28.8 40.0 44.9 40.7 60.1 23.1 21.3 42.8 18.0 36.9 28.0 32.5 a. Determine the mean and sample standard deviation (s) for x,. b. Determine the mean and sample standard deviation (s) for x,. c. Find an 85% confidence interval for the difference of means. d. What does this mean in the context of the problem (do tech companies have a greater percentage foreign revenue than basic consumer product companies)? M ISUS
Transcribed Image Text:Means E Ayalnesh Antokhin - Day 68 Diff x + ocs.google.com/document/d/1P8K-jQT4AwuMFwVpFSsuVBig5j36v5ZanP-Z99UG6W/edit Netflix h Hulu Disney+ | * Lakewood Infinite Campus JSTOR okhin - Day 68 Difference of Means Practice ☆回 Insert Format Tools Add-ons Help Last edit was seconds ago 100% Normal text Calibri - - 14 BIUA 川, 三三▼… 7. For large U.S. companies, what percentage of their total income comes from foreign sales? A random sample of technology companies (IBM, Hewlett-Packard, Intell, and others) gave the following information: Technology companies, % foreign revenue: x,; n, = 16 52.8 55.7 47.0 59.6 55.3 41.0 65.1 51.1 53.4 50.8 48.5 44.6 49.4 61.2 39.3 41.8 Another independent random sample of basic consumer product companies (Goodyear, Sarah Lee, H.J. Heinz, Toys 'R' Us) gave the following information: Basic consumer product companies, % foreign revenue: x,; n, = 17 28.0 30.5 34.2 50.3 11.1 28.8 40.0 44.9 40.7 60.1 23.1 21.3 42.8 18.0 36.9 28.0 32.5 a. Determine the mean and sample standard deviation (s) for x,. b. Determine the mean and sample standard deviation (s) for x,. c. Find an 85% confidence interval for the difference of means. d. What does this mean in the context of the problem (do tech companies have a greater percentage foreign revenue than basic consumer product companies)? M ISUS
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