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Over half of all American teens (ages 12 to 17 years) have an online profile, mainly on Facebook. A random sample of 459 teens with

Over half of all American teens (ages 12 to 17 years) have an online profile, mainly on Facebook. A random sample of 459 teens with profiles found that 289 included photos of themselves.

a. Give the 99.8% large-sample confidence interval for the proportionpof all teens with profiles who include photos of themselves.

b. Give the plus four 99.8% confidence interval forp.

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