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Unformatted text preview: Section 4.4 Page 1 Estimation of Proportions Point Estimate gG g gggg For a large enough sample, size, the sampling distribution of follows a normal distribution. (1- )x100% Confidence Interval z 2 1 n Example. Historically, 10% of homes in Florida have radon levels higher than recommended by the EPA. A city in north central Florida has hired an environmental consulting group to determine whether is has a greater than normal problem with radon gas. A random sample of 200 homes indicated that 25 had radon levels exceeding EPA recommendations. Construct and interpret a 95% confidence interval for the true proportion of homes with excessive levels of radon. Section 4.4 Page 2 Hypothesis Testing Steps in Hypothesis Testing 0. Check Assumptions 1. State Hypotheses and Set 2. Compute the Test Statistic 3. Find the critical region or calculate p-value 4. Draw Conclusion...
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This note was uploaded on 10/03/2011 for the course STAT E509 taught by Professor Wheatley during the Spring '10 term at South Carolina.
- Spring '10
- Normal Distribution