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
-v
TEST
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
-v
TEST
b
¡-v
FREQ
b¡
0
Eb
³
Solution
David's final course
average is 80.25.
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