document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=750182>Question 750182</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please walk me through this\r<BR>\n" );
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document.write( "Listed below are the durations (in hours) of a simple random sample of all flights of a space shuttle program.  Find the range, variance, and standard deviation for the sample data.  Is the lowest duration time unusual? Why or why not?<BR>\n" );
document.write( "77 100 240 191 163 263 195 371 254 231 384 336 223 250 0<BR>\n" );
document.write( "The range of the sample data is [  ] hours <BR>\n" );
document.write( "The variance of the sample data is [  ] <BR>\n" );
document.write( "The standard deviation of the sample data is [  ] hours  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #806393 by </B><A HREF=/tutors/aboutme.mpl?userid=CubeyThePenguin><B>CubeyThePenguin(3113)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=CubeyThePenguin><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=CubeyThePenguin><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=806393\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> range = highest value - lowest value = 384 - 0 = 384 hr\r<BR>\n" );
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document.write( "variance<BR>\n" );
document.write( "= (sum of squares of data values subtracted from the mean)/(number of data values - 1)<BR>\n" );
document.write( "= 11108\r<BR>\n" );
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document.write( "standard deviation<BR>\n" );
document.write( "= sqrt(variance)<BR>\n" );
document.write( "= 105.4 hr\r<BR>\n" );
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document.write( "for reference: mean = (sum of all data values)/(number of data values) = 218.5 hr </SPAN>\n" );
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