random digit dialing telephone system was used to conduct a survey asking 3230 city residents; "do you support a 3% tax increase to fund the construction of 2 new school buildings?" Out of the 3230 respondents, 2506 admitted that they support the tax increase. Which of the following is a 95% confidence interval for the proportion of all residents that support the tax increase to fund school building construction? A) (0.7210, 0.7888) B) (0.7299, 0.7742) C) (0.7212, 0.7976) D) (0.7615, 0.7902)

Construct a 95% confidence interval for p1 - p2 for a survey that finds 30% of 240 males and 41% of 200 females are opposed to the death penalty. Group of answer choices a.(-0.200, -0.021) b.(-1.532, 1.342) c.(-1.324, 1.512) d.(-0.561, 0.651)

You recently sent out a survey to determine if the percentage of adults who use social media has changed from 56%, which was the percentage of adults who used social media five years ago. Of the 2335 people who responded to survey, 1725 stated that they currently use social media.a) Use the data from this survey to construct a 93% confidence interval estimate of the proportion of adults who use social media. Record the result below in the form of (#,#)(#,#). Round your final answer to four decimal places.

In a survey of 40 students in an introductory statistics class, a professor asks how many states in the United States each student has visited. Using the data from the professor's sample, a 99% confidence interval for the average number of states all students at the professor's school have visited is found to be (6.78, 12.18). Determine whether each of the following statements is valid or invalid. You may assume that the sample is representative of all students at the professor's school. (a)  We are 99% confident that the average number of states visited by the 40 students the professor surveyed is between 6.78 and 12.18.  Valid Invalid   (b)  Based on the 99% confidence interval, there is evidence that the average number of states visited by all students at the professor's school is different from 16.  Valid Invalid   (c)  We are 99% confident that the average number of states visited by all students at the professor's school is between 6.78 and 12.18.  Valid Invalid   (d)…