Translate the statement into a confidence interval. Approximate the level of confidence.   In a survey of 1000 adults in a​ country, 78​% think teaching is one of the most important jobs in the country today. The​ survey's margin of error is ±4​%. The confidence interval for the proportion is (blank, blank).   The level of confidence (rounded to four decimal places as needed) is (blank).

In a survey of 2269 ​adults, 701 say they believe in UFOs.   Construct a 95% confidence interval for the population proportion of adults who believe in UFOs.       A 95​% confidence interval for the population proportion is ​(nothing​,nothing​). ​(Round to three decimal places as​ needed.) Interpret your results. Choose the correct answer below.     A. With 95​% ​confidence, it can be said that the population proportion of adults who believe in UFOs is between the endpoints of the given confidence interval.   B. The endpoints of the given confidence interval shows that 95​% of adults believe in UFOs.   C. With 95​% ​confidence, it can be said that the sample proportion of adults who believe in UFOs is between the endpoints of the given confidence interval.   D. With 95​% ​probability, the population proportion of adults who do not believe in UFOs is between the endpoints of the given confidence interval.

Use the confidence interval to find the estimated margin of error. Then find the sample mean. A biologist reports a confidence interval of (2.3,3.1) when estimating the mean height (in centimeters) of a sample of seedlings. The estimated margin of error is The sample mean is B

Use the confidence interval to find the estimated margin of error. Then find the sample mean.   A store manager reports a confidence interval of (48.1,78.7) when estimating the mean price​ (in dollars) for the population of textbooks. The estimated margin of error is?

In a survey of 2295 ​adults, 746 say they believe in UFOs.   Construct a 90% confidence interval for the population proportion of adults who believe in UFOs.       A 90​% confidence interval for the population proportion is ​(nothing​,nothing​). ​(Round to three decimal places as​ needed.) Interpret your results. Choose the correct answer below.     A. With 90​% ​confidence, it can be said that the sample proportion of adults who believe in UFOs is between the endpoints of the given confidence interval.   B. The endpoints of the given confidence interval shows that 90​% of adults believe in UFOs.   C. With 90​% ​confidence, it can be said that the population proportion of adults who believe in UFOs is between the endpoints of the given confidence interval.   D. With 90​% ​probability, the population proportion of adults who do not believe in UFOs is between the endpoints of the given confidence interval.

Use the confidence interval to find the estimated margin of error. Then find the sample mean. A biologist reports a confidence interval of (2.3,3.3) when estimating the mean height (in centimeters) of a sample of seedlings. The estimated margin of error is

Janet wants to estimate the percentage of people who have been required to take a drug test for work. She surveys 250 individuals and finds that 175 have taken a drug test for work. Identify the values needed to calculate a confidence interval at the 98% confidence level. Then use Excel to find the confidence interval. Round the final answer to three decimal places. Provide your answer below:

A poll of 2612 U.S. adults found that 15% regularly used Facebook as a news source. Find the margin of error and confidence interval for the percentage of U.S. adults who regularly use Facebook as a news source, at the 90% level of confidence. Round all answers to 2 decimal places. Margin of Error (as a percentage): Confidence Interval: _______% to ______% Find the margin of error and confidence interval for the percentage of U.S. adults who regularly use Facebook as a news source, at the 95% level of confidence. Round all answers to 2 decimal places. Margin of Error (as a percentage): Confidence Interval: ________% to ________% Find the margin of error and confidence interval for the percentage of U.S. adults who regularly use Facebook as a news source, at the 99% level of confidence. Round all answers to 2 decimal places. Margin of Error (as a percentage): Confidence Interval: ________% to ______% The more error we allow, the less precise our estimate. Therefore, as the confidence…

A poll of 2368 U.S. adults found that 40% regularly used Facebook as a news source. Find the margin of error and confidence interval for the percentage of U.S. adults who regularly use Facebook as a news source, at the 90% level of confidence. Round all answers to 2 decimal places. Margin of Error (as a percentage): Confidence Interval: % to % Find the margin of error and confidence interval for the percentage of U.S. adults who regularly use Facebook as a news source, at the 95% level of confidence. Round all answers to 2 decimal places. Margin of Error (as a percentage): Confidence Interval: % to % Find the margin of error and confidence interval for the percentage of U.S. adults who regularly use Facebook as a news source, at the 99% level of confidence. Round all answers to 2 decimal places. Margin of Error (as a percentage): Confidence Interval: % to % The more error we allow, the less precise our estimate. Therefore, as the confidence level increases, the precision of our…

Use the confidence interval to find the estimated margin of error. Then find the sample mean. A biologist reports a confidence interval of (3.6,4.8) when estimating the mean height​ (in centimeters) of a sample of seedlings.    What is the estimated margin of error?