2. In a recent survey, 30 out of 57 randomly selected respondents said they believe in the existence of extraterrestrials. a. Use this information to compute a 99% confidence interval for the population proportion of people who believe in the existence of extraterrestrials. Please clearly show that you checked to make sure the data meet all necessary conditions for inference.

Q: what would be the 90% confidence interval of the true proportion of young adults who have received…

A: Given that sample size is n = 190 And the sample proportion is 70% = 0.7 At 90% confidence level,…

Q: Out of 400 people sampled, 32 had kids. Based on this, construct a 95% confidence interval for the…

A: Solution: Let X be the number of people had kids and n be the sample number of people. From the…

Q: Suppose we take a survey of 200 students and ask how much they study per week. The result is an…

A: From the above data  We are given that the  95% confidence interval is (10, 10.5). The population…

Q: Star and Tribune newspaper, there is an article entitled “1 in 8 school buses fail tests.”   The…

A: Formula for the sample size needed to estimate a population proportion is

Q: A surprising number of young adults (ages 19 to 25) still live in their parents’ homes. A random…

A: Given  X1=986, n1=2253, X2=923, n2=2629

Q: In a survey on supernatural experiences, 722 of 4019 adult Americans surveyed reported that they had…

A: Given : Sample Size, n = 4019 Number of successes, x = 722 confidence level,c=0.9

Q: When 302 college students are randomly selected and surveyed, it is found that 122 own a car. What…

A: E have to find point estimate with with confidance interval..

Q: 16) So, Elizabeth is working through school right now and she is planning on being an attorney. She…

A: 16)   It is given that, p hat is 0.56 and n is 1,000.

Q: A poll found that people from the north now have relatively warm feelings toward people from the…

A: From the given information, let X be the number of northerners who consider two region friends.  X =…

Q: Your professor wishes to estimate the proportion of ALL high school students enrolled in…

A:

Q: A statistics instructor was interested in the proportion of all Kent State students who live on…

A: The proportion that students at Kent State live on campus is obtained below:From the given…

Q: 7. A recent survey of 500 women indicated that 29% of women over age 55 in the study were widows.…

A: Givensample size(n)=500p^=29%=0.29confidence level=90%

Q: According to a Field Poll, 254 out of 409 of California adults feel that "education and our schools"…

A: From the given information, Consider, X denotes the number of adults feel that "education and our…

Q: a) What proportion of workers answered yes to the survey? b) What was the margin of error?

A: Here, the 95% confidence interval for the proportion of workers that answered 'yes' is (0.62, 0.73).…

Q: f 260 employees selected randomly from one company, 18.46% of them commute by carpooling. Construct…

A: Given data, n=260 p=18.46% =0.1846 z-value at 98% confidence is Zc=2.326

Q: In a survey of 74 US females, 56 said they had gone to the dentist within the past year. What is…

A: Given X=56 n=74

Q: On February 20, 2018 nebnews.com ran a story titled "Poll: Support for gun control hits record…

A:

Q: CorpPlus is a large corporation with many employees. You work for the human resources department of…

A: The random sample of employees, The number of employees who say the corporation is a great place to…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Here, there is no information about the population parameter. Hence, use the conservative estimate…

Q: We survey 1004 teens age 13-19, we record whether or not they have had sex education. 817 respond…

A: a) The point estimate of population proportion is sample proportion. The number of teens who have…