12-24 Statistics
8312STAT.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:42 PM Printed: 02/19/01 1:37
PM Page 24 of 38
To display the STAT CALC menu, press … ~.
EDIT CALC TESTS
1:1-Var Stats Calculates 1-variable statistics.
2:2-Var Stats Calculates 2-variable statistics.
3:Med-Med Calculates a median-median line.
4:LinReg(ax+b) Fits a linear model to data.
5:QuadReg Fits a quadratic model to data.
6:CubicReg Fits a cubic model to data.
7:QuartReg Fits a quartic model to data.
8:LinReg(a+bx) Fits a linear model to data.
9:LnReg Fits a logarithmic model to data.
0:ExpReg Fits an exponential model to data.
A:PwrReg Fits a power model to data.
B:Logistic Fits a logistic model to data.
C:SinReg Fits a sinusoidal model to data.
For each STAT CALC menu item, if neither Xlistname nor
Ylistname is specified, then the default list names are L1
and L2. If you do not specify freqlist, then the default is 1
occurrence of each list element.
For most STAT CALC menu items, you can specify a list of
data occurrences, or frequencies (freqlist).
Each element in freqlist indicates how many times the
corresponding data point or data pair occurs in the data set
you are analyzing.
For example, if L1={15,12,9,14} and ÙFREQ={1,4,1,3}, then
the TI-83 interprets the instruction 1.Var Stats L1, ÙFREQ to
mean that 15 occurs once, 12 occurs four times, 9 occurs
once, and 14 occurs three times.
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.
STAT CALC Menu
STAT CALC
Menu
Frequency of
Occurrence for
Data Points