document.write( "Question 1099499: In a survey at a local college, 17% of students reported that they do not own a mobile device with internet capabilities. If 20 students are selected at random, find the variance of the number of students that don't own a mobile device with internet capabilities.
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\n" ); document.write( "7.8
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\n" ); document.write( "2.8
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\n" ); document.write( "1.7
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\n" ); document.write( "3.4
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Algebra.Com's Answer #714228 by jim_thompson5910(35256) $\"\"$ $\"About$

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n = sample size = 20
\n" ); document.write( "p = probability of selecting someone who does not own a mobile device with internet capabilities = 0.17
\n" ); document.write( "Variance of Binomial Distribution = n*p*(1-p)
\n" ); document.write( "Variance of Binomial Distribution = 20*0.17*(1-0.17)
\n" ); document.write( "Variance of Binomial Distribution = 2.822
\n" ); document.write( "Variance of Binomial Distribution = 2.8 \n" ); document.write( "

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