Calculating And Graphing Paired-Variable Statistical Data - Casio fx-7400G Manual

Statistical Graphs and Calculations
The following describes the meaning of each of the parameters.
_
x
x
x
n
minX ............... Minimum
Q1 .................. First quartile
Med ................ Median
Q3 .................. Third quartile
maxX .............. Maximum
Mod ................ Mode
• Press 4 (DRAW) to return to the original single-variable statistical graph.
4. Calculating and Graphing Paired-
Variable Statistical Data
Under "Plotting a Scatter Diagram," we displayed a scatter diagram and then per-
formed a logarithmic regression calculation. Let's use the same procedure to look at
the six regression functions.
k k k k k Linear Regression Graph
P.98 Linear regression plots a straight line that passes close to as many data points as
possible, and returns values for the slope and
of the line.
The graphic representation of this relationship is a linear regression graph.
(G-Type) Q1(GRPH)[4(SET)c
(Scat) 1(Scat)
(GPH1)
Q1(GRPH)1(GPH1)
(X) 1(X)
..................... Mean of data
x
................... Sum of data
x 2
.................. Sum of squares
.................. Population standard deviation
n
................ Sample standard deviation
n
-1
..................... Number of data items
4(DRAW)
Chapter 7
y y
-intercept ( -coordinate when
1 2
x
= 0)
3 4
105