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• Precautions when editing data input for standard deviation also apply for
regression calculations.
• Do not use variables A through F, X, or Y to store data when performing
statistical calculations. These variables are used for statistical
calculation temporary memory, so any data you may have assigned to
them may be replaced by other values during statistical calculations.
• Entering the REG Mode and selecting a regression type (Lin, Log, Exp,
Pwr, Inv, Quad) clear variables A through F, X, and Y. Changing from
one regression type to another inside the REG Mode also clears these
variables.
Normal Distribution (SD)
Use the key to enter the SD Mode when you want to perform a
calculation involving normal distribution.
(SD)
• In the SD Mode and REG Mode, the key operates as the key.
• Press (DISTR), which produces the screen shown below.
Input a value from to to select the probability distribution
calculation you want to perform.
Example: To determine the normalized variate ( t ) for x = 53 and
normal probability distribution P(
t ) for the following data: 55, 54, 51, 55,
53, 53, 54, 52
( t = -0.284747398, P( t ) = 0.38974 )
In the SD Mode:
(CLR) (Scl) (Stat clear)
55 54 51 55 53 54 52
53 (DISTR) ( t )
-0.284747398
51
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