document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=933890>Question 933890</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a) an experiment measures eye contact of  a control group of people, during a 5 minute interval. What is the probability that a randomly selected person makes eye contact for >230 seconds which is the mean for paranoid schizophrenics, during the five minute interval? Assume times are normally distributed with &#963;= 55 sec, &#956;= 184 seconds. \r<BR>\n" );
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document.write( "b) what is the value that separates off the lowest 10% of the eye contact times, from the upper 90%? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #567128 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=567128\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  &#956;= 184 seconds, &#963;= 55 sec.  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z+=+blue%28x+-+184%29%2Fblue%2855%29 ALIGN=MIDDLE  ALT=\"z+=+blue%28x+-+184%29%2Fblue%2855%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "Person selected:<BR>\n" );
document.write( "P( x > 230) =   P(z > 46/55) = normalcdf(46/55, 100) = .2015  0r 20.15%<BR>\n" );
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document.write( "P( .10 < x < .90) = P( -1.2816 < z < 1.2816) = normalcdf(-1.2816, 1.2816) = .8000  0r 80%<BR>\n" );
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document.write( " Using a TI calculator 0r similarly a Casio fx-115 ES plus<BR>\n" );
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document.write( "Recommend Using stattrek.com to check  Results<BR>\n" );
document.write( "until You are familiar with Using Your Calculator.<BR>\n" );
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