document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=911786>Question 911786</A>: <I><SPAN STYLE=\"word-break: break-all;\"> AA recent survey found that 56% of mobile phone users, between the ages of 18 to 34, had a smartphone. Suppose a random sample of 20 mobile phone users were selected. What is the probability that less than 5 of them have a smartphone? [Ensure that you (1) clearly denote the probability distribution and its parameter(s) and (2) state the formula]<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #553347 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=553347\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> AA recent survey found that 56% of mobile phone users, between the ages of 18 to 34, had a smartphone. Suppose a random sample of 20 mobile phone users were selected. What is the probability that less than 5 of them have a smartphone? [Ensure that you <BR>\n" );
document.write( "(1) clearly denote the probability distribution and its parameter(s) <BR>\n" );
document.write( "Binomial Problem with n = 20 and p(have smartphone) = 0.56<BR>\n" );
document.write( "--------------------<BR>\n" );
document.write( "(2) state the formula<BR>\n" );
document.write( "P(x = k) = 20Ck(0.56)^k*(0.44)^(20-k)<BR>\n" );
document.write( "--------------------------------------------<BR>\n" );
document.write( "Your Problem::<BR>\n" );
document.write( "P(0<= x <=4) = binomcdf(20,0.56,4) = 0.0011<BR>\n" );
document.write( "------------------<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "---------------<BR>\n" );
document.write( "  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );