Suppose you are planning to construct a 23% confidence interval for a one sample population proportion.  Through use of StatCrunch, what would the value of your critical number need to be?

According to a poll, 86% of California adults (434 out of 506 surveyed) feel that education is one of the top issues facing California. We wish to construct a 90% confidence interval for the true proportion of California adults who feel that education is one of the top issues facing California. Find a 90% confidence interval for the population proportion. (Round your answers to three decimal places.) X * Enter a number.

Identify the t- scores for a 99% confidence interval if the sample size is 70?

Suppose a 90 percent confidence interval to estimate a population proportion was calculated from a sample proportion of 18 percent and a margin of error of 4 percent. What is the width of the confidence interval?

A survey of 240 teachers found that two-thirds of those surveyed do not live in Sydney. Can you conclude statistically that the population proportion who do not live in Sydney is less than ​0.75? Use a​ 95% confidence interval. What is the confidence interval and is 0.75 within the interval?

You sample 33 people to see if they own a dog, and find that 46% of them (rounded) do own a dog. What is the LOW end of the 95% confidence interval for this study? Leave your answer in decimal format to three decimal places. In other words, .036 instead of 3.6% or .114 instead of 11.4%..

In a survey of 1798 US adults, 1365 said they had paid a bill online within the past year.  What is the LOWER endpoint of a 90% confidence interval for the population proportion?  What is the UPPER endpoint of a 90% confidence interval for the population proportion?

According to a poll, 81% of California adults (410 out of 506 surveyed) feel that education is one of the top issues facing California. We wish to construct a 90% confidence interval for the true proportion of California adults who feel that education is one of the top issues facing California.What is a point estimate for the true population proportion?

We want to determine if the true proportion of students who consume caffeine is not equal to 35%. We can use a confidence interval to determine this. O True False

Suppose NBC has asked the same question to a sample of 1296 adults nine months earlier, finding 47% with an optimistic outlook for the year ahead.  Develop a 95% confidence interval for the percentage of American adults who had an optimistic outlook for the economy nine months earlier.