Texas Instruments ti nspire cx - Page 39

TI-Inspire manual 36
t(22) = -
1.1841, p
<.002
Scroll down and
you find the
means and
Honolulu’s mean
= 77.25 while
Little Rock’s mean
temperature =
63.25
Wriitten this way
There was a significant difference(p <.002) in th eaverage
temperatures of Little Rock and Honolulu, t(22) = -1.1841, p <.002( s=
3.2) with Honolulu mean temperature being 77.25 and Little Rocks
mean = 63.25 (s = 14.65)
It was said earlier to used pooled unless one standard deviation and more than 2 times
which in this case it is. Repeat the statistic usign “non-pooled) The result change only
slightly. t(12.8) = 3.23, p <.004
Since it seems logical that
Honolulu has a higher
average than Little Rock
choose 1 < 2
If the two standard deviations are
similar (neither is more than twice of
the other), use pooled