A recent survey showed that among 650 randomly selected subjects who completed 4 years of college, 142 smoke and 508 do not smoke. Determine a 99.9% confidence interval for the true proportion of the given population that smokes. 99.9% CI: _____to ______

A student found that in a random sample of 300 people in a town, 105 play sports. Based on this sample, construct a 90% confidence interval for the population proportion of all people in the town who play sports.Give your answers as decimals, rounded to three decimal places.

Find the margin of​ error, using a​ 95% confidence​ level, for estimating the percentage of all young people who earned a high school diploma. ____?

Of 102 randomly selected adults, 42 were found to have high blood pressure. A 90% confidence interval for the true percentage of all adults that have high blood pressure is . What is the value of ? (Round to two decimal places).

In a survey of 2250 ​adults, 732 say they believe in UFOs. Construct a 99%confidence interval for the population proportion of adults who believe in UFOs. A 99​% confidence interval for the population proportion is ​(__​,___​).

Find a 95% confidence interval for the true population proportion.  In a poll of 1079 college students, 22% said that they had cheated at least once on an exam

A research study reported a 95% confidence interval for the mean time of hip surgeries based on a sample of 91 patients as (116 minutes, 138 minutes). Which of the following statements is correct about the given interval? A. Correct B. Incorrect - We are 100% sure that the mean time of hip surgeries of the sampled 91 patients is between 116 and 138 minutes. -95% of the hip surgeries of the sampled 91 patients will fall between 116 and 138 minutes. We are 100% sure of hip surgeries take between 116 and 138 minutes. We are 95% sure that hip surgeries will take, on average, 116 to 138 minutes.

Your analysis of the raw data indicates that 16 of the 30 students reported driving no more than 20 miles per day. Calculate a 98% confidence interval for the sample proportion.  What Z Score was used?

An arborist is interested in determining the mean diameter (in centimeters) of mature white oak trees at a certain height above the base. She measures 7 of these trees and finds the following sample statistics: F = 49.09 and s = interval for the mean diameter of a mature white oak tree. 13.80. Construct a 95% confidence

a. 14.0, 16.3, 18.7, 19.9, 21.3       b. 16.1, 13.4, 13.6, 14.9, 14.1, 10.5 Construct the 95% confidence interval for the difference in u of the two given samples.