Question

Find a 99% confidence interval for the population proportion if a sample of 200 had a sample proportion of 42%

Answer 1

ANSWER

Given that, A sample of 200 had a sample proportion of 42% That is, n=200, p =0.42 Confidence level, u-1=0.99 Implies, level of significance, a =0.01 99% confidence interval for the population proportion is pt 2012 V 1 Bp 20.025 0.42+ (2:58), (0.42)(1 -0.42) (Use z-table) 200 {0.42 (2.58)(0.0349 ) {0.42 0.09} 0.33.0.51 }

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