Sharp EL-9650 - Page 196

186
CHAPTER 7
for US
[09 Ztest2samp]
Tests the identity of two sample means, µ
1
and µ
2
, when the population standard
deviation, σ
1
and σ
2
, from two sample data sets collected from two different
populations, are known.
<Example 9>
µ
1
> µ
2
is the test for two sets of sample data:
= 77.3, σ
1
= 3.4, n
1
= 30 and
=
75.2, σ
2
= 2.8, n
2
= 20 ( and indicate each sample mean).
1. Set to the numerical value input mode (InputList).
2. Press
E 0 9 to open the parameter input
screen.
Input each obtained parameter and test method (the
screen to the right shows the screen with input
complete).
3. Press Ï
to solve. The answer will be
displayed as shown to the right.
* “n1” and “n2” are positive integers.
[10 Ztest1prop]
Tests the success probability P
0
of a population. P
0
is the success probability obtained
from sample data collected from a population.
<Example 10>
A coin was tossed 100 times and landed heads side up 42 times. Normally, the
probability of heads facing up is 0.5, but we will test this obtained sample data (test
using prop ≠ P
0
).
1. Press
E 1 0 to input each parameter.
* “prop” shows the success probability of population
estimated from the obtained success probability (since the
test will be conducted using hypothesis prop P
0
, the
screen will look like the one shown to the right).
* x indicates the success number and n indicates the trial
number. (“n” is a positive integer.)
EL-9650-(07)En (178-196) 8/1/00, 9:08 AM186