In an extensive government study conducted this year, a simple random sample of 500 households was obtained and 80 had experienced property damage due to a crime. (a) Calculate a 95% confidence interval for the true proportion of households that have experienced property damage due to crime. Round your answer to one decimal place

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.

You sample 33 people to see if they own a dog, and find that 46% of them (rounded) do own a dog. What is the LOW end of the 95% confidence interval for this study? Leave your answer in decimal format to three decimal places. In other words, .036 instead of 3.6% or .114 instead of 11.4%..

The Kaiser Family Foundation comissioned an extensive survey in 2004 that investigated the degree to which American youth from ages 8 - 18 have access to various forms of media. They distributed written questionnaires to a random sample of 2032 youths in this age range. Among the 2032 youths who were sampled, 49 % reported having a video game player and 31 % reported having a computer in their bedroom. Round your answers to three decimal places, if required. a. Determine a 90 % confidence interval for the population proportion of American youths who have a video game player in their bedrooms. b. Repeat part a for the proportion who have a computer in their bedrooms. c. Determine the margin-of-error (half-width) for each of these confidence intervals. The margin-of-error for the 90 % CI for the population proportion of American youths who have a video game player in their bedroom is The margin-of-error for the 90 %0 CI for the population proportion of American youths who have a computer…

A survey is taken of 250 students, and a P of 0.45 is found. The same survey is repeated with 1,000 students, and the same value is found. Compare the two 95% confidence intervals. What is the relationship? Is the margin of error for the second one four times smaller? How much smaller is it?