Texas Instruments TI-60 - Page 41

CHAPTER 1 - 4
STATISTICS
Hole Do not oraso ihe data from the statistical registers The data is used
in ihe next part of the example
Use Ihe x and y data lo determine the correlation coefficient of the data
p te*a Display Comments
l*«* ICorrJ 0 969757193 Find correlation coefficient
Because this value is dose to 1. the data values have a high positive
relationship II iho correlation coefficient were closer to 0. the data values
would not t>e very closely related It the correlation coefficient were close to
- t. Ihe data values would have a high negative relationship
Note Do rtol erase the data from Ihe statistical registers The data is used
In the nexi pad of the example
Determine the equation that best represents the data (y *= ax ♦ b) by
calculating Iho slope and Intercept
Pro * s Display Comments
[IntcpJ 51668 53933 Display intercept
l?d [Slope) 8325 842697 Display slope
Therefore, ihe equation tor this line is
y - 8325 642697X ♦ 51668 53933
Now you can use this equation to calculate Ihe y - value tor any given x
value without re-entering all Ihe data
31-G8