he manager of the dairy section of a large supermarket took a random sample of 250 egg cartons and found that 40 contain at least one broken egg. Let p be the proportion of egg cartons with at least one broken egg out of the population of all egg cartons stocked by this store. Find a point estimate of p. Find a 95% confidence interval for p.

in a town in nj we take a random sample of 100 residents. It turns out that 25% of the adult residents have degrees higher than high school diploma. Find a 90% confidence interval.

A random sample of 300 college freshmen found that 112 of them own an iPhone. Find a 95% confidence interval for the true proportion of college freshmen that own an iPhone. Show all work leading up to your answer below.

If n=14, ¯xx¯(x-bar)=34, and s=4, construct a confidence interval at a 80% confidence level. Assume the data came from a normally distributed population.

In a survey of 6000 high school students, 3230 read books during the summer break. Using these sample statistics, find a 99% confidence interval for the proportion p of all high school students that read books during the summer break.

In a survey of 31 students at a local high school, 15 support changing the school's mascot. Find the 95% confidence interval for the true population proportion of students who support changing school's mascot.Choose the correct confidence interval and critical value used in the calculation. A. (0.254,0.714) (Zc=2.576) B. (0.304,0.664)(Zc=1.96) C. (0.304,0.664)(tc=2.0423) D. 0.334,0.634)(Zc=1.645) E. (0.274,0.694) (Zc=2.326)

Most married couples have two or three personality preferences in common. A random sample of 362 married couples found that 138 had three preferences in common. Another random sample of 552 couples showed that 218 had two personality preferences in common. Let p1 be the population proportion of all married couples who have three personality preferences in common. Let p2 be the population proportion of all married couples who have two personality preferences in common.   (a) Find a 95% confidence interval for p1 – p2. (Use 3 decimal places.)lower limit =upper limit=

Out of a sample of 760 people, 367 own their homes. Construct a 95% confidence interval for the population mean of people in the world that own their homes. A CL

If n=17, ¯xx¯(x-bar)=50, and s=20, construct a confidence interval at a 98% confidence level. Assume the data came from a normally distributed population.

At a large high school, an assistant principal wants to know how intelligent the students at the school are. An intelligence test is administered to an SRS of 50 students, out of over 2000 students. The mean score was 115 and the standard deviation was 15. Construct a 99% confidence interval for the mean score of all students in the school. A) (109.32, 120.69) B) (119.58, 123.50) C) (110.87, 129.41) D) Can not be determined from the information given.