document.write( "Question 1124939: A certain group of test subjects had pulse rates with a mean of
\n" ); document.write( "77.4
\n" ); document.write( "77.4 beats per minute and a standard deviation of
\n" ); document.write( "11.5
\n" ); document.write( "11.5 beats per minute. Use the range rule of thumb to identify the limits separating values that are significantly low or significantly high. Is a pulse rate of
\n" ); document.write( "140.4
\n" ); document.write( "140.4 beats per minute significantly low or significantly​ high? \n" ); document.write( "
Algebra.Com's Answer #741300 by fcabanski(1391)\"\" \"About 
You can put this solution on YOUR website!
Range Rule of Thumb - The standard deviation will be range/4. In other words, the range will be 4 * SD.\r
\n" ); document.write( "\n" ); document.write( "Significantly low is below the \"usual\" range, while sig high is above the \"usual\" range. The \"usual\" range is 2 SD above and 2 SD below the mean.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "The \"usual\" range for this situation is 77.4 - 2(11.5) to 77.4 + 2 (11.5) = 54.4 to 100.4. \r
\n" ); document.write( "\n" ); document.write( "Significantly low will be less than 54.4.\r
\n" ); document.write( "\n" ); document.write( "Sig high will be greater than 100.4.\r
\n" ); document.write( "\n" ); document.write( "140.4 is significantly high.\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
\n" );