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Topic: Q1 and Q3 in Minitab
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John Burnette

Posts: 161
Registered: 12/6/04
Q1 and Q3 in Minitab
Posted: Aug 30, 1996 11:04 PM
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As we progress through M&M's first chapter we are noticing a difference in
terminology between Minitab and the text.

Not that it makes much difference but if Q1 doesn't lie on a data point it
interpolates between the two it is between. This isn't a lot different
from the way that Moore defines Q1.

To make things more confusing, the boxplots ARE the same as M&M defines
however minitab calls those values "Upper and lower hinges" HL and HU, as
they call the values, seem to be calculated by the process Moore uses to
find Q1 and Q3.

To be sure, HL and Q1 will always be very close to one another. It's not a
problem but your students should know that what minitab gives as Q1 will
not necessarily be the same as what Moore defines as Q1.

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