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For large U.S. companies, what percentage of their total income comes from foreign sales? A random sample of 15 technology companies (Example: IBM, Hewlett-Packard, Intel, and others) showed that the mean was 51% and a standard deviation of 7.1%. Another independent random sample of 18 basic consumer product companies (Example Goodyear, Sarah Lee, H.J. Heinz, Toys 'R' Us) showed that the mean was 31.6% and a standard deviation of 12.1%. Let 1 be the population mean for large US technology companies and let μ₂ be the population mean for Basic Consumer product companies. (a) Using your calculator, find a 95% confidence interval for μ₁ −μ₂. (Round your answers to 2 decimal places.) Lower limit -38.03 Upper Limit -24.15 What can you state with 95% confidence? (b) Choose the correct conclusion X% The population mean for large US technology companies is greater than the population mean for Basic Computer companies. c X% The population mean for large US technology companies is less than the population mean for Basic Computer companies. FUND

For large U.S. companies, what percentage of their total income comes from foreign sales? A random sample of 15 technology companies (Example: IBM, Hewlett-Packard, Intel, and others) showed that the mean was 51% and a standard deviation of 7.1%. Another independent random sample of 18 basic consumer product companies (Example Goodyear, Sarah Lee, H.J. Heinz, Toys 'R' Us) showed that the mean was 31.6% and a standard deviation of 12.1%. Let 1 be the population mean for large US technology companies and let μ₂ be the population mean for Basic Consumer product companies. (a) Using your calculator, find a 95% confidence interval for μ₁ −μ₂. (Round your answers to 2 decimal places.) Lower limit -38.03 Upper Limit -24.15 What can you state with 95% confidence? (b) Choose the correct conclusion X% The population mean for large US technology companies is greater than the population mean for Basic Computer companies. c X% The population mean for large US technology companies is less than the population mean for Basic Computer companies. FUND

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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For large U.S. companies, what percentage of their total income comes from foreign sales? A random sample of 15 technology companies (Example: IBM, Hewlett-Packard, Intel, and others) showed that the mean was 51% and a standard deviation of 7.1%. Another independent random sample of 18 basic consumer product companies (Example Goodyear, Sarah Lee, H.J. Heinz, Toys 'R' Us) showed that the mean was 31.6% and a standard deviation of 12.1%. Let u be the population mean for large US technology companies and let μ₂ be the population mean for Basic Consumer product companies. (a) Using your calculator, find a 95% confidence interval for u₁-₂. (Round your answers to 2 decimal places.) Lower limit -38.03 X% Upper Limit -24.15 What can you state with 95% confidence? (b) Choose the correct conclusion X% The population mean for large US technology companies is greater than the population mean for Basic Computer companies. Cr: -:--nt d The population mean for large US technology companies is less than the population mean for Basic Computer companies.
Transcribed Image Text:For large U.S. companies, what percentage of their total income comes from foreign sales? A random sample of 15 technology companies (Example: IBM, Hewlett-Packard, Intel, and others) showed that the mean was 51% and a standard deviation of 7.1%. Another independent random sample of 18 basic consumer product companies (Example Goodyear, Sarah Lee, H.J. Heinz, Toys 'R' Us) showed that the mean was 31.6% and a standard deviation of 12.1%. Let u be the population mean for large US technology companies and let μ₂ be the population mean for Basic Consumer product companies. (a) Using your calculator, find a 95% confidence interval for u₁-₂. (Round your answers to 2 decimal places.) Lower limit -38.03 X% Upper Limit -24.15 What can you state with 95% confidence? (b) Choose the correct conclusion X% The population mean for large US technology companies is greater than the population mean for Basic Computer companies. Cr: -:--nt d The population mean for large US technology companies is less than the population mean for Basic Computer companies.
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