Chapter 7: Statistical Analyses 131
7307ENG.DOC CH 7, Statistical Analyses, English Julie Hewlett Revised: 07/29/98 12:07 PM Printed: 05/19/99
9:00 AM Page 131 of 22
2. Return to the Home screen,
and calculate the average of
the test scores.
-l:
-v""3
-vTEST
b¡-v
FREQ bEb
stdDev( stdDev( -
v
"
"
6 6
stdDev( returns the standard deviation of list. If a second list,
freq, is specified, it is interpreted as the frequency of the
elements in the first list. list and freq must have the same
number of elements.
stdDev(list,freq[,type])
type=0 (population standard deviation) or 1 (sample
population deviation). If type is not specified, the calculator
returns sample population deviation.
Find the population standard
deviation of ¨TEST (from the
previous example). Use ¨FREQ as
your freq.
-v""6
-vTEST b
¡-vFREQ
b¡0Eb
³
Solution David's final course
average is 80.25.