Stat 215 Quiz 8

Stat 215 Quiz 8 - population proprotion of non-smokers is...

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Stat 215 Quiz 8 Module: Quiz , Exercise: CI_mu Question Out of a random sample of 100 people, 80 said they were non- smokers. Find a 95 percent confidence interval (z = 1.96) for the population proportion of non-smokers. State the conclusion. Answer LCL = 0.8 - 1.96 sqrt(0.8 * 0.2/100) = 0.722, UCL = 0.8 + 1.96 sqrt(0.8 * 0.2/100) = 0.878, 95 percent confident that the
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Unformatted text preview: population proprotion of non-smokers is between 0.722 and 0.878. Your Answer The 95 percent confidence interval is 73 - 87. This means that 95% of the time the number of smokers will be between 73 and 87. Grader Comments (none) Grade 8.0 (out of 10.0) Total 8.0 (out of 10.0)...
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This note was uploaded on 04/03/2008 for the course STAT 215 taught by Professor Dr. during the Spring '08 term at WVU.

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