Over half of all American teens (ages 12 to 17 years) have an online profile, mainly on Facebook. A random sample of 458 teens with profiles found that 309 included photos of themselves.
(a) Give the 99% large-sample confidence interval for the
proportion p of all teens with profiles who include photos
of themselves.
Large-sample Interval: to
(b) Give the plus four 99% confidence interval for p .
(The plus-four interval always pulls the results away from 0% or
100%, whichever is closer. Even though the condition for using the
large-sample interval is met, the plus four interval is more
trustworthy.)
Plus four Interval: to
Over half of all American teens (ages 12 to 17 years) have an online profile, mainly...
(2 points) Over half of all American teens (ages 12 to 17 years) have an online profile, mainly on Facebook. A random sample of 549 teens with profiles found that 402 included photos of themselves. (a) Give the 99% large-sample confidence interval for the proportion p of all teens with profiles who include photos of themselves. Large-sample Interval: (b) Give the plus four 99% confidence interval for p. (The plus-four interval always pulls the results away from 0% or 100%,...
(2 points) Over half of all American teens (ages 12 to 17 years) have an online profile, mainly on Facebook. A random sample of 550 teens with profiles found that 328 included photos of themselves. (a) Give the 99.9% large-sample confidence interval for the proportion p of all teens with profiles who include photos of themselves. Large-sample Interval: to (b) Give the plus four 99.9% confidence interval for p . (The plus-four interval always pulls the results away from 0%...
(2 points) Over half of all American teens (ages 12 to 17 years) have an online profile, mainly on Facebook. A random sample of 549 teens with profiles found that 424 included photos of themselves. (a) Give the 96% large-sample confidence interval for the proportion p of all teens with profiles who include photos of themselves Large-sample Interval to (b) Give the plus four 96% confidence interval for p (The plus-four interval always pulls the results away from 0% or...
photos for each question are all in a row
(1 point) In the following questions, use the normal distribution to find a confidence interval for a difference in proportions pu - P2 given the relevant sample results. Give the best point estimate for p. - P2, the margin of error, and the confidence interval. Assume the results come from random samples. Give your answers to 4 decimal places. 300. Use 1. A 80% interval for pı - P2 given that...