2, TEST IT! The city\'s Director of Public Health has a policy guideline that re

Question

2, TEST IT! The city's Director of Public Health has a policy guideline that requires active mosquito control measures whenever the proportion of properties with mosquito-bearing pooled water exceeds 35%. His analysts test the data from the previous question for support of the claim that the proportion exceeds this threshold. What is the approximate p-value for the test of Ha: p 0.35? (Use p, the unbiased estimate, in your test.) (a) 0.0071 (d) 0.0055 (b) 0.0045 (e) 0.0069 (c) 0.9945 3. PowER RANGER The Senior Scientist for Project Banzai directs his statistician to design a sampling test to detect excessive variation in the output of its manufactured oscillation overthrusters. A pilot study has found the variation in output to be ?2-2. The test should be able to detect a mean difference of ?? 0.5 at the ? 0.1 level, with a power of 1-?-09. What is the required sample size for this test? (b) 52 (e) 27 (a) 28 (d) 53 (c) 26

Explanation / Answer

Solution would be

2) P value = P(z>0.35)

= 0.0045

Option B is Correct

3) Sample Size

= 2*3

= 26

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