ame Chapter 16: Quiz ow your work A school district gives vision tests to 133 of the incoming kindergarten children and finds that 16 of them are nearsighted. a. Create a 95% confidence interval.

Research Question: Do crows remember the faces of people who bother them? A volunteer wearing a caveman mask was scolded by 158 out of 444 crows he encountered, and the crows scolded a person in the neutral mask in 109 out of 922 encounters.In order to use the percentile method, you needed to generate a dot plot in StatKey. Which of the following best describes what's going on in this dot plot? Choice 1: StatKey randomly generated many more samples crows, and each dot represents the average number of caveman masks each sample scolded. Choice 2:StatKey randomly generated many more crows, and each dot represented the difference in the number of caveman and neutral masks that each crow scolded. Choice 3:StatKey randomly generated many more crows, and each dot represented the difference in the proportion of caveman and neutral masks that each crow scolded. Choice 4:StatKey randomly generated many more samples of crows, and for each sample, calculated the difference in the proportions…

Chapter 7 review, question 3

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)

A survey of 360 college seniors found that 305 wish they had spent more time studying. Find a 94% confidence interval for the true proportion p of those who wish they had spent more time studying.

A survey asked, "How many tattoos do you currently have on your body?" Of the 1233 males surveyed, 183 responded that they had at least one tattoo. Of the 1042 females surveyed, 139 responded that they had at least one tattoo. Construct a 95% confidence interval to judge whether the proportion of males that have at least one tattoo differs significantly from the proportion of females that have at least one tattoo. Interpret the interval. C Let p₁ represent the proportion of males with tattoos and p2 represent the proportion of females with tattoos. Find the 95% confidence interval for p₁ -P2- The lower bound is The upper bound is (Round to three decimal places as needed.)

orffout 3. In a survey conducted by the marketing agency 11mark, 241 of 1000 adults 19 years of age or older confessed to bringing and using their cell phone every trip to the bathroom (confessions included texting and answering phone calls). Construct a 96% confidence interval for the population proportion of adults 19 years of age or older confessed to bringing and using their cell phone every trip to the bathroom. Clearly state your results. BAIEŽ 12052 2002

We randomly sample 218 individuals and find that 97 have a college degree. a.)Construct a 95% confidence interval. b.) Describe our interpretation of the confidence level.

The figure to the right shows the results of a survey in which 2000 college graduates from the year 2016 were asked questions about employment. Construct 99% confidence intervals for the population proportion of college students who gave each response. Employment College students' responses to questions about employment Expect to stay at first employer for 3 or more years Completed an apprenticeship or intemship 70% 66% Employed in field of study 61% Feel underemployed 46% Prefer to work for a large company 15% The 99% confidence interval for the proportion of college students that expect to stay at their first employer for 3 or more years is (Round to three decimal places as needed.)

A study examined parental influence on​ teenagers' decisions to smoke. A group of students who had never smoked were asked about their​ parents' attitudes to smoking. The students were questioned two years later to see if they had started smoking. The study found​ that, of the 287 students whose parents​ disapproved, 58 became smokers. Of the 48 students with lenient​ parents, 11 smoked. Complete parts a through c below. ​a) Create a​ 95% confidence interval for the difference between the proportion of children with lenient parents who later​ smoked, p1​, and the proportion of children with disapproving parents who later​ smoked, p2.   The confidence interval for p1−p2 is −0.101negative 0.101,0.1550.155. ​(Round to three decimal places as​ needed.)   ​b) Interpret your interval in this context. Select the correct choice below and fill in the answer boxes within your choice.   ​(Round to one decimal place as​ needed.)   A. There is​ 95% confidence that the proportion of teens…