Sharp el-9950 - Page 179

178
Chapter 8: Statistics & Regression Calculations
2. Enter the appropriate value
into each field.
3. Press
@
h
.
Answerswillbedisplayed
on the screen, where the
numerical value within ()
indicates the confidence
intervalofthesuccessprobabilityatacondencelevelof95%.
* n is a positive integer.
15 Zint2prop Findsthecondenceintervalofthedifference(P
1
-P
2
) of the
success probability obtained from the two sets of sample data
collected from two different populations.
Example
Findthecondenceintervalofthesuccessprobability(P
1
,P
2
) at a
confidence level of 0.9 for the two sets of sample data n
1
= 50, x
1
=
16 and n
2
= 20, x
2
= 5.
1. Press
S
E
1 5
.
The parameter input screen will appear.
2. Enter the appropriate value
into each field.
3. Press
@
h
.
4. Answerswillbedisplayed
on the screen, where the
numerical value within ()
indicates the confidence
intervalofthesuccessprobabilityP
1
-P
2
at a confidence level of
90%.
* n
1
and n
2
are positive integers.