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If n=340 and p' (p-prime) = 0.68, construct a 99% confidence interval. Give your answers to...

If n=340 and p' (p-prime) = 0.68, construct a 99% confidence interval.

Give your answers to three decimals.

Math   Statistics-And-Probability   
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Answer #1

Solution:

Given:

Sample size = n = 340

Sample proportion = = 0.68

Confidence level = 0.99

So, α=0.01

Critical value Zc = 2.576 ...Using excel formula, =ABS(NORMSINV(0.01/2))

The 99% confidence interval for population proportion is,

We are 99% confident that the true population proportion pp is contained by the interval (0.615, 0.745).

Done

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