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Tests (TEST)

The following pages explain various statistical calculation methods based on the principles described above. Details concerning statistical principles and terminology can be found in any standard statistics textbook.

On the initial STAT Mode screen, press 3(TEST) to display the test menu, which contains the following items.

•3(TEST)b(Z) ... Z Tests (p. 1-2-2) c(T) ... t Tests (p. 1-2-10) d(χ2) ... χ2 Test (p. 1-2-18)

e(F) ... 2-Sample F Test (p. 1-2-20) f(ANOVA) ... ANOVA (p. 1-2-22)

kZ Tests

uZ Test Common Functions

You can use the following graph analysis functions after drawing a graph.

• 1(Z) ... Displays z score.

Pressing 1(Z) displays the z score at the bottom of the display, and displays the pointer at the corresponding location in the graph (unless the location is off the graph screen).

Two points are displayed in the case of a two-tail test. Use d and e to move the pointer. Press ito clear the z score.

• 2(P) ... Displays p-value.

Pressing 2(P) displays the p-value at the bottom of the display without displaying the pointer.

Press ito clear the p-value.

u1-Sample Z Test

This test is used when the population standard deviation is known to test the hypothesis. The 1-SampleZ Test is applied to the normal distribution.

 

 

Z = o – ∝0

o : mean of sample

 

 

 

σ

 

∝o : assumed population mean

 

 

 

 

 

 

σ : population standard deviation

 

 

 

 

n

 

 

 

 

 

 

 

n : size of sample

 

 

 

 

 

 

# The following V-Window settings are used for

# Executing an analysis function automatically

 

 

 

 

drawing the graph.

stores the z and p values in alpha variables Z

 

 

Xmin = –3.2, Xmax = 3.2, Xscale = 1,

and P, respectively.

 

 

Ymin = –0.1, Ymax = 0.45, Yscale = 0.1

 

 

 

 

 

 

 

 

 

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