According to a recent survey, 71% of teens age 12-17 in a certain country used social networks in 2009. A random sample of 140 teenagers from this age group was selected. a) calculate the standard error of the proportion. b) what is the probability that less than 73% of the teens from this sample used social networks? c) what is the probability that between 70-80% of the teens from this sample used social networks? Please help! I am struggling. Thank you!
According to a recent survey, 71% of teens age 12-17 in a certain country used social networks in 2009. A random sample of 140 teenagers from this age group was selected. a) calculate the standard error of the proportion. b) what is the probability that less than 73% of the teens from this sample used social networks? c) what is the probability that between 70-80% of the teens from this sample used social networks? Please help! I am struggling. Thank you!
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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According to a recent survey, 71% of teens age 12-17 in a certain country used social networks in 2009. A random sample of 140 teenagers from this age group was selected.
a) calculate the standard error of the proportion.
b) what is the probability that less than 73% of the teens from this sample used social networks?
c) what is the probability that between 70-80% of the teens from this sample used social networks?
Please help! I am struggling. Thank you!
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