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Standrd deviation
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https://XX.wikipedia.XXX/wiki/Chebyshev%27s_inequality#XXXXXXXXXXXXXXXXXXXXXXX</a>)</p><p>X. XXXXXXX XX XXX table in your book XX would get a percentage XX.56%, this XXXXXXXXXXX X.5 x 8.1= 12.XX XXX XXXXX the mean 27.X which is XX.45 for the XXXXX XXXXX. XXX XXXXX limit XXXXX XX XX.X - XX.XX = 15.XX. So XXX XXXXX XX XXXXX for XXX XX.XX % middle group is (XX.15, XX.XX)</p><p>3. The XXXXXXX percentage of commuters XXX commute XXX times XXXXXXX 3 and XX.6 XXXXXXX is XXXXXXXXX XX XXX X XXXXX. (X - XX.3)/ X.X XX -X XXXXXXXX deviations below XXX mean. 51.X XX (XX.X - 27.X) / 8.1 which XXXX XXXX us 3 standard XXXXXXXXXX XXXXX. So once XXXXX looking at the table XX XXX 88.XX% XX people XXX in XXXX range of commute times.</p><p><b>Chebyshev’s XXXXXXXXXX</b>According XX XXX X.S. Census Bureau, the XXXX of XXX XXXXXXX time XX XXXX for a resident XX Boston, XXXXXXXXXXXXX, is 27.X minutes. XXXXXX that the standard XXXXXXXXX XX XXX XXXXXXX XXXX is 8.1 minutes XX answer XXX following:</p> <ol><li><p>XXXX XXXXXXX percentage of XXXXXXXXX in Boston XXX a XXXXXXX time XXXXXX X XXXXXXXX XXXXXXXXXX of the mean?</p></li><li><p>XXXX minimum percentage of commuters in XXXXXX XXX a XXXXXXX time within 1.X XXXXXXXX XXXXXXXXXX XX XXX XXXX? XXXX XXX the XXXXXXX XXXXX XXXXXX 1.5 standard deviations of XXX mean?</p></li><li><p>XXXX is the minimum percentage of XXXXXXXXX who have XXXXXXX times XXXXXXX X XXXXXXX XXX XX.6 XXXXXXX?</p></li></ol>">
