Teens on the Net A poll of 1070 teens aged 13 to 17 fi nds
Chapter 5, Problem 5.51(choose chapter or problem)
Teens on the Net A poll of 1070 teens aged 13 to 17 fi nds that 742 have received personal messages online from people they dont know. Th e announced margin of error for this result is plus or minus 3 percentage points. Th e news report does not give the confi dence level, but you can be quite sure that its 95%. (a) What is the value of the sample proportion p^ who have received personal messages online from people they dont know? Explain in words what the population parameter p is in this setting. (b) Make a confi dence statement about the parameter p
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