User manual - Tests (TEST)

7
On the initial STAT2 Mode screen, press 3 (TEST) to display the test menu, which
contains the following items.
• 3(TEST)b(Z) ... Z Tests (p.7)
c(T) ... t Tests (p.15)
d(χ
2
) ... χ
2
Test (p.23)
e(F) ... 2-Sample F Test (p.25)
f(ANOVA) ... ANOVA (p.27)
kk
kk
k Z Tests
uu
uu
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 i to 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 i to clear the p-value.
uu
uu
u1-Sample Z Test
This test is used when the sample standard deviation for a population is known to test the
hypothesis. The 1-Sample Z Test is applied to normal distribution.
Z =
o –
0
σ
µ
n
o : mean of sample
µ o : assumed population mean
σ : population standard deviation
n : size of sample
# The following V-Window settings are used for
drawing the graph. Xmin = –3.2, Xmax = 3.2,
Xscale = 1, Ymin = –0.1, Ymax = 0.45, Yscale
=0.1
# Executing an analysis function automatically
stores the z and p values in alpha variables Z
and P, respectively.