According to a recent survey, 71% of teens ages 12-17 in a certain country used social networks in 2009. A random sample selected. Complete parts a through d below. a. Calculate the standard error of the proportion. p=0.0383 (Round to four decimal places as needed.) b. What is the probability that less than 73% of the teens from this sample used social networks? P(Less than 73% of the teens from this sample used social networks) = (Round to four decimal places as needed.) 140 teenagers from this
According to a recent survey, 71% of teens ages 12-17 in a certain country used social networks in 2009. A random sample selected. Complete parts a through d below. a. Calculate the standard error of the proportion. p=0.0383 (Round to four decimal places as needed.) b. What is the probability that less than 73% of the teens from this sample used social networks? P(Less than 73% of the teens from this sample used social networks) = (Round to four decimal places as needed.) 140 teenagers from this
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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![**Statistical Analysis of Teenage Social Network Usage**
According to a recent survey, 71% of teens ages 12-17 in a certain country used social networks in 2009. A random sample of 140 teenagers from this age group was selected. Complete the following parts:
**a. Calculate the standard error of the proportion.**
The standard error (\(\sigma_p\)) is calculated and found to be:
\[
\sigma_p = 0.0383 \quad (\text{Round to four decimal places as needed.})
\]
**b. What is the probability that less than 73% of the teens from this sample used social networks?**
To find the probability that less than 73% of the teens from this sample used social networks, input your calculation here:
\[
P(\text{Less than 73% of the teens from this sample used social networks}) = \text{[blank]} \quad (\text{Round to four decimal places as needed.})
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Transcribed Image Text:**Statistical Analysis of Teenage Social Network Usage**
According to a recent survey, 71% of teens ages 12-17 in a certain country used social networks in 2009. A random sample of 140 teenagers from this age group was selected. Complete the following parts:
**a. Calculate the standard error of the proportion.**
The standard error (\(\sigma_p\)) is calculated and found to be:
\[
\sigma_p = 0.0383 \quad (\text{Round to four decimal places as needed.})
\]
**b. What is the probability that less than 73% of the teens from this sample used social networks?**
To find the probability that less than 73% of the teens from this sample used social networks, input your calculation here:
\[
P(\text{Less than 73% of the teens from this sample used social networks}) = \text{[blank]} \quad (\text{Round to four decimal places as needed.})
\]
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