Question

a.For a confidence level of 96%, find the critical value

b.In a recent poll, 170 people were asked if they liked dogs,
and 56% said they did. Find the margin of error of this poll, at
the 95% confidence level.

Give your answer to three decimals

c.Out of 200 people sampled, 32 had kids. Based on this,
construct a 99% confidence interval for the true population
proportion of people with kids.

Give your answers as decimals, to three places

______< p <_________

d.A political candidate has asked you to conduct a poll to
determine what percentage of people support her.

If the candidate only wants a 7% margin of error at a 99%
confidence level, what size of sample is needed?

Give your answer in whole people.

Answer #1

In a recent poll, 480 people were asked if they liked dogs, and
56% said they did. Find the margin of error of this poll, at the
95% confidence level.
Give your answer to three decimals

In a recent poll, 250 people were asked if they liked dogs, and
17% said they did. Find the margin of error of this poll, at the
99% confidence level. Give your answer to three decimals

In a recent poll, 560 people were asked if they liked dogs, and
7% said they did. Find the margin of error of this poll, at the 90%
confidence level.
Give your answer to three decimals

In a recent poll, 430 people were asked if they liked dogs, and
92% said they did. Find the margin of error of this poll, at the
90% confidence level. Give your answer to three decimals

In a recent poll, 150 people were asked if they liked dogs, and
57% said they did. Find the Margin of Error for this poll, at the
99% confidence level. Give your answer to three decimal places if
possible.

1. If n=240 and ˆp (p-hat) =0.3, find the margin of error at a
90% confidence level
Give your answer to three decimals.
2. In a recent poll, 160 people were asked if they liked dogs,
and 61% said they did. Find the margin of error of this poll, at
the 90% confidence level.
Give your answer to three decimals

In a recent poll, 560 people were asked if they liked dogs, and
66% said they did. Find the margin of error of this poll, at the
99% confidence level.

In a recent poll, 390 people were asked if they liked dogs,
and 76% said they did. Find the Margin of Error for this poll, at
the 95% confidence level. Give your answer to four decimal places
if possible.

In a recent poll, 500 people were asked if they liked baseball,
and 57% said they did. Find the margin of error of this poll, at
the 95% confidence level. As in the reading, in your calculations:
--Use z = 1.645 for a 90% confidence interval --Use z = 2 for a 95%
confidence interval --Use z = 2.576 for a 99% confidence interval.
Give your answer rounded to three decimal places.

A political candidate has asked you to conduct a poll to
determine what percentage of people support her.
If the candidate only wants a 8% margin of error at a 99%
confidence level, what size of sample is needed?
Give your answer in whole people.

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