Question

Over half of all American teens (ages 12 to 17 years) have an online profile, mainly on Facebook. A random sample of 456 teens with profiles found that 346 included photos of themselves.

(a) Give the 99.5% 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 99.5% 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

Answer #1

Thank you.

Over half of all American teens (ages 12 to 17 years) have an
online profile, mainly on Facebook. A random sample of 494 teens
with profiles found that 300 included photos of themselves.
(a) Give the 90% 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 90% confidence interval for p . (The
plus-four interval always pulls the results away from 0% or 100%,...

Researchers presented a random sample of undergraduates with two
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the dogs and owners were deliberately mismatched. Students were
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