Chapter 12: Statistics
200
Each element in
freqlist
must be
‚
0, and at least one element must be > 0.
Noninteger
freqlist
elements are valid. This is useful when entering frequencies expressed as
percentages or parts that add up to 1. However, if
freqlist
contains noninteger frequencies,
Sx
and
Sy
are undefined; values are not displayed for
Sx
and
Sy
in the statistical results.
1-Var Stats
1-Var Stats
(one-variable statistics) analyzes data with one measured variable. Each element in
freqlist
is the frequency of occurrence for each corresponding data point in
Xlistname
.
freqlist
elements must be real numbers > 0.
1-Var Stats
[
Xlistname
,
freqlist
]
2-Var Stats
2-Var Stats
(two-variable statistics) analyzes paired data.
Xlistname
is the independent variable.
Ylistname
is the dependent variable. Each element in
freqlist
is the frequency of occurrence for each
data pair (
Xlistname,Ylistname
).
2-Var Stats
[
Xlistname
,
Ylistname
,
freqlist
]
Med-Med (ax+b)
Med-Med
(median-median) fits the model equation y=ax+b to the data using the median-median
line (resistant line) technique, calculating the summary points x1, y1, x2, y2, x3, and y3.
Med-Med
displays values for
a
(slope) and
b
(y-intercept).
Med-Med
[
Xlistname
,
Ylistname
,
freqlist
,
regequ
]
