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Texas Instruments ti 34 multiview Manual

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Statistics
% t v
% t displays a menu with the following options:
•1-Var Stats analyzes data from 1 data set with 1 measured variable, x.
•2-Var Stats analyzes paired data from 2 data sets with 2 measured variables—x,
the independent variable, and y, the dependent variable.
•StatVars displays a secondary menu of statistical variables. The StatVars menu only
appears after you have calculated 1-Var or 2-Var stats. Use $and #to locate the
desired variable, and press <to select it.
Variables Definition
nNumber of xor (x,y) data points.
Ïor ÐMean of all xor yvalues.
Sx or Sy Sample standard deviation of xor y.
Îxor ÎyPopulation standard deviation of xor y.
Σ
xor
Σ
ySum of all xor yvalues.
Σ
x2or
Σ
y2Sum of all x2or y2values.
Σ
xy Sum of (x…y) for all xy pairs.
aLinear regression slope.
bLinear regression y-intercept.
rCorrelation coefficient.
x' (2-Var) Uses aand bto calculate predicted xvalue
when you input a yvalue.
y' (2-Var) Uses aand bto calculate predicted yvalue
when you input an xvalue.
To define statistical data points:
1. Enter data in L1, L2, or L3. (See Data Editor and List Conversions.)
2. Press % t. Select 1-Var or 2-Var and press <.
3. Select L1, L2, or L3, and the frequency.
4. Press <to display the menu of variables.
5. To clear data, press v v, select a list to clear, and press <.
Math Functions 26
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