document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=992907>Question 992907</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Suppose Z is a standard normal random variable.\r<BR>\n" );
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document.write( "If P(-z < Z < z) = 0.5588, find z.\r<BR>\n" );
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document.write( "Find P( -2.28 < Z < -0.63).\r<BR>\n" );
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document.write( "Please help me out!<BR>\n" );
document.write( "Thank you so much </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #612361 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=612361\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Suppose Z is a standard normal random variable. <BR>\n" );
document.write( "If P(-z < Z < z) = 0.5588, find z.<BR>\n" );
document.write( "Since 1/2 the probability is to the right of the mean<BR>\n" );
document.write( "find the z-value with a left-tail = 0.5+(1/2)(0.5588) = 0.7795<BR>\n" );
document.write( "Ans: z = invNorm(0.7795) = 0.77051<BR>\n" );
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document.write( "Find P(-2.28 < Z < -0.63) = normalcdf(-2.28,-0.63) = 0.2530<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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