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.
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