document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=863080>Question 863080</A>: <I><SPAN STYLE=\"word-break: break-all;\"> There is a 5% chance that the mean reading speed of a random samlple of 19 second grade studetns will exceed what value? u(x) =93 and SD = 2.294 <BR>\n" );
document.write( "Use technology to find the sample mean x for which there is an area of 0.05 to the right of the normal curve with u(x) of 93 and SD 2.294\r<BR>\n" );
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document.write( "I would like to know how to find the answer using a TI83 calculator. The answer is 94.6 and I have no idea how that is! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #520190 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=520190\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> There is a 5% chance that the mean reading speed of a random samlple of 19 second grade studetns will exceed what value? u(x) =93 and SD = 2.294 <BR>\n" );
document.write( "Use technology to find the sample mean x-bar for which there is an area of 0.05 to the right of the normal curve with u(x) of 93 and SD 2.294 <BR>\n" );
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document.write( "I would like to know how to find the answer using a TI83 calculator. The answer is 94.6 and I have no idea how that is!<BR>\n" );
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document.write( "Note:: Hard to tell if the given SD is for the sample means or for the<BR>\n" );
document.write( "population of reading speeds.<BR>\n" );
document.write( "If if is the SD for the means use 2.294/sqrt(19)<BR>\n" );
document.write( "If it is the SD for the population use  2.294<BR>\n" );
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document.write( "I assumed it was the SD for the population.<BR>\n" );
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document.write( "Find the z-value with a left tail of 0.95::<BR>\n" );
document.write( "invNorm(0.95) = 1.645<BR>\n" );
document.write( "Find the x-bar value using x-bar = z*s+u<BR>\n" );
document.write( "x-bar = 1.645*(2.294/sqrt(19))+93 = 93.86 <BR>\n" );
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document.write( "If you assume the SD = 2.294 if the SD of the sample means<BR>\n" );
document.write( "you get x-bar = 1.645*2.294+93 = 96.8<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
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