document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1172450>Question 1172450</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Do people of different age groups differ in their response to email​ messages? A survey reported that75.7 ​% of users over 70 years of age believe that email messages should be answered​ quickly, as compared to 53.8 ​% of users 13 to 50 years old. Suppose that the survey was based on​ 1,000 users over 70 years of age and​ 1,000 users 13 to 50 years old. The table to the right summarizes the results. Complete parts​ (a) through​ (c).\r<BR>\n" );
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document.write( "a. Suppose you know that the respondent is between 13 and 50 years old. What is the probability that he or she answers​ quickly?<BR>\n" );
document.write( "The probability that he or she answers quickly is\r<BR>\n" );
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document.write( "Answers_Quickly	13-50	70+	Total<BR>\n" );
document.write( "Yes	        538	757	1295<BR>\n" );
document.write( "No	        462	243	705<BR>\n" );
document.write( "Total	        1000	1000	2000\r<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 #797497 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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/cgi-bin/show-face.mpl?user=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=797497\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Answers_Quickly 13-50 70+ Total<BR>\n" );
document.write( "Yes------------  538 757 1295<BR>\n" );
document.write( "No------------- 462 243 705<BR>\n" );
document.write( "Total---------- 1000 1000 2000 \r<BR>\n" );
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document.write( "It was given as 53.8%<BR>\n" );
document.write( "If the question were, suppose you know that somebody answers quickly. What is the probability that they are between 13 and 50?That would be 538/1295.\r<BR>\n" );
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