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Unformatted text preview: ts that contain 95% of the measurements with 99% confidence level. Question 2) A random sample of size 25 taken from a normal population with a standard deviation 5 has a mean 80. A second random sample of size 36, taken from a different normal population with a standard deviation 3, has a mean 75. Find a 94% confidence interval for . Question 3) In a random sample of 1000 homes in a certain city, it is found that 228 are heated by oil. Find the 99% confidence interval for the proportion of homes in this city that are heated by oil....
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This document was uploaded on 02/22/2014.

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