document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=610020>Question 610020</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A random sample of movie lengths in minutes is as follows:<BR>\n" );
document.write( "110 95 131 257 118 153<BR>\n" );
document.write( "8. Find the standard deviation. <BR>\n" );
document.write( "9. Are any of these movie lengths considered unusual in the sense of our textbook?<BR>\n" );
document.write( "Explain. Does this differ with your intuition? Explain.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #384091 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=384091\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A random sample of movie lengths in minutes is as follows:<BR>\n" );
document.write( "110 95 131 257 118 153<BR>\n" );
document.write( "8. Find the standard deviation.<BR>\n" );
document.write( "Ans: 58.74<BR>\n" );
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document.write( "9. Are any of these movie lengths considered unusual in the sense of our textbook?<BR>\n" );
document.write( "Explain. <BR>\n" );
document.write( "Sample mean = 114<BR>\n" );
document.write( "2 standard deviations is the limit for \"unusual\":<BR>\n" );
document.write( "2 standard deviations below is negative<BR>\n" );
document.write( "2 standard deviations above is 114 + 2*58.74 = 231.48<BR>\n" );
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document.write( "So 257 minutes is \"unusual\" movie length.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( "\n" );
document.write( "Does this differ with your intuition? Explain.<BR>\n" );
document.write( "No; most movies are right around 2 hours or 120 minutes.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );