TI-89 / TI-92 Plus / Voyage™ 200 PLT Statistics with List Editor App ‰ Ints (Intervals) Menu 190
LinRegTInt
Description
2 ‰ (
Ints) Æ 7:LinRegTInt for the TI-89
‰ (Ints) Æ 7:LinRegTInt for the TI-92 Plus / Voyage™ 200 PLT
In the response case, an X Value is required to determine a calculated y value, y_hat, at
which point a prediction confidence interval around y_hat is determined, as well as a
confidence interval for the mean.
In the slope case,
LinRegTInt computes a linear regression T confidence interval for the
slope coefficient b. If the confidence interval contains 0 this is insufficient evidence to
indicate that the data exhibits a linear relationship.
Data Inputs
X List, Y List The lists of independent and dependent variables.
Freq (optional) List containing the frequency values for the data in List. The default is 1.
All elements must be real numbers |0.
Each element in the frequency
(Freq) list is the frequency of occurrence
for each corresponding data point in the input list specified in the
List
field.
Store RegEqn to (optional) Designated variable for storing the Regression Equation.
Interval Optional interval type. 0 = slope (default). 1 = predict.
X Value The input X value at which y_hat is calculated.
C Level Confidence level probability with default = .95
Slope Outputs
Outputs Stored to Description
C Int lower,
upper
Confidence interval on the slope containing confidence level probability of
distribution.
b b Regression line fit offset and slope parameter estimates.
ME me Margin of error.
df df Degrees of freedom.
s s Fit error standard deviation for y-(a+b*x).
SE Slope se SE Slope = s/sqrt(sum(sum(x-x_bar)^2).
a a Regression line fit offset and slope parameter estimates.
r
2
rsq Coefficient of determination.
r r Correlation coefficient.
resid* resid Residuals of the curves fit y = a+bx.
* The output variables are pasted to the end of the list editor when Results!Editor option is YES,
(located in ƒ (Tools) 9:Format).
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