Question

(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 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

Soluhon- teens Given Sample Aandom included themselves hat u24 photos & 424 the Confidente infav smple proporkion teens P all niydn Confidence inteval 96 inteval Smple S49 .036

О.а42 - 0о36я оаз2+ 0-0367 to оа353 four Give thre Сonti dene intewal fov Х*2 n+4 Su44 426 SS3 9703 1 Сonb denrе inteaval fox В Cr-? nt4 (u-оm) о-а303 0- 9а63 4 (в an?) 03 2.o5 о-о366 o.133 O-8069