Question

We wish to estimate what percent of adult residents in a certain county are parents. Out of 600 adult residents sampled, 270 had kids. Based on this, construct a 90% confidence interval for the proportion p p of adult residents who are parents in this county.

Answer #1

Let "p" be the proportion of adult residents in a certain county are parents.

In a sample of 600 adult 270 had kids.

Therefore

The 90% confidence interval for the proportion of adults residents who are parents in this county is given by:

By using z table: z0.05=1.64

Hence 90% confidence interval is:

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county are parents. Out of 400 adult residents sampled, 128 had
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county are parents. Out of 500 adult residents sampled, 235 had
kids. Based on this, construct a 99% confidence interval for the
proportion p of adult residents who are parents in this county.
Express your answer in tri-inequality form. Give your answers as
decimals, to three places. < p < Express the same answer
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proportion p of adult residents who are parents in this
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Express your answer in tri-inequality form. Give your answers as
decimals, to three places.
< p < Express the same answer using the point
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certain county are parents. Out of 400 adult residents sampled, 296
had kids. Based on this, construct a 95% confidence interval for
the proportion p of adult residents who are parents in this county.
Express your answer in tri-inequality form. Give your answers as
decimals, to three places.
__< p <__ Express the same answer using the point estimate
and margin of error. Give your answers as decimals,...

QUESTION PART A: Assume that a sample is used to estimate a
population proportion p. Find the margin of error
M.E.that corresponds to a sample of size 300 with 44%
successes at a confidence level of 99.9%.
M.E. = %
Answer should be obtained without any preliminary rounding.
However, the critical value may be rounded to 3 decimal places.
Round final answer to one decimal place
QUESTION PART B: We wish to estimate what percent of adult
residents in a...

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Margin of Error (as a percentage):
Confidence Interval: % to %
Find the margin of error and confidence interval for the
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