document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=782440>Question 782440</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 		           Cellphone 	 This Year<BR>\n" );
document.write( " 		               Yes  	No	 Total<BR>\n" );
document.write( "Own a comput	Yes	37	8	 45<BR>\n" );
document.write( "	                No   38    17	 55<BR>\n" );
document.write( "	Total	                75	25	 100\r<BR>\n" );
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document.write( "a.	Find the probability a randomly selected family has a cell phone.\r<BR>\n" );
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document.write( "b.	Find the probability a randomly selected family has a cell phone, given that they own a computer.<BR>\n" );
document.write( "c.	Are the events of owning a computer and having a cell phone independent or dependent events?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #476497 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=476497\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 		           Cellphone 	       This Year<BR>\n" );
document.write( " 		               Yes  	No	 Total<BR>\n" );
document.write( "Own a comput	       Yes	37	8	 45<BR>\n" );
document.write( "	                No       38     17	 55<BR>\n" );
document.write( "	Total	                75	25	 100\r<BR>\n" );
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document.write( "a.	Find the probability a randomly selected family has a cell phone.<BR>\n" );
document.write( "Ans: 75/100<BR>\n" );
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document.write( "b.	Find the probability a randomly selected family has a cell phone, given that they own a computer.<BR>\n" );
document.write( "Ans: 37/46<BR>\n" );
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document.write( "c.	Are the events of owning a computer and having a cell phone independent or dependent events?<BR>\n" );
document.write( "Check:: P(have cell)*P(own computer) = P(have cell and own computer)<BR>\n" );
document.write( "(75/100)(37/100) = 37/100<BR>\n" );
document.write( "That is false.<BR>\n" );
document.write( "So those events are dependent.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );