Question

Assume that a sample is used to estimate a population proportion p. Find the 90% confidence interval for a sample of size 205 with 10% successes. Enter your answer as a tri-linear inequality using decimals (not percents) accurate to three decimal places. < p

Answer 1

Answer:

Given that:

Assume that a sample is used to estimate a population proportion p. Find the 90% confidence interval for a sample of size 205 with 10% successes.

The 90% confidence interval for population proportion is

From the standard normal table, the z- critical value at 90% confidence is 1.645

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The 90% confidence interval for population proportion is 0.0656 to 0.1344