document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1165424>Question 1165424</A>: <I><SPAN STYLE=\"word-break: break-all;\"> When we were able to offer ‘in person’ classes, a student had computed that it takes an average of 17 minutes with a standard deviation of 3 minutes to drive from home, park the car, and walk to an early morning class.<BR>\n" );
document.write( "a) One day it took the student 21 minutes to get to class. What is the z-value corresponding to the 21 minutes?<BR>\n" );
document.write( "b) On another day it took the student 17 minutes to get to class. What would the z-score be? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #789907 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=789907\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> z=(x-mean)/sd<BR>\n" );
document.write( "so for the first, z=(21-17)/3<BR>\n" );
document.write( "z=4/3\r<BR>\n" );
document.write( "\n" );
document.write( "the second one is z=0. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );