185
STATISTICS/ REGRESSION CALCULATIONS
for US
[08 Ztest1samp]
Tests the hypothesis of population mean
µ
when the value of the population stan-
dard deviation,
σ,
from sample data collected from a population, is known.
<Example 8>
The average weight and standard deviation (
σ
) for a product being manufactured are
known to be 52.4g and 4.5, respectively.
The validity is judged when the weight of 20 of these units averages 53.4g (x).
1. Since we will be using numerical input for entering
the statistics, set to the numerical value input mode.
E
1
7
®
2. Select Z test from the statistic function menu then
input each parameter.
Press
E
0
8
to display the Ztest parameter
input screen (as shown to the right).
Explanation of the screen:
•
µ
≠ µ
0
,
µ
<
µ
0
,
µ
>
µ
0
…Hypothesis setting (double side test, single side test settings)
•
µ
indicates the population mean,
µ
0
indicates the population mean hypothesis
obtained from sample data,
σ
indicates the population standard deviation, indi-
cates the sample mean and n indicates the sample number. (“n” is a positive
integer.)
• As a hypothesis,
µ
≠
µ
0
(double side test) is found using the obtained sample data.
3. The cursor pointer is located at
µ
≠
µ
0
initially.
Press
≥
to move the cursor pointer to
µ
0
(
µ
≠
µ
0
will be highlighted, indicating
that it has been selected).
4. Press 52.4
®
to input the hypothesized value of
µ
0
.
5. Press 4.5
®
to input the value of
σ
.
6. Press 53.4
®
to input the value of .
7. Press 20
®
to input the value of n (as shown to
the right).
8. Press
Ï
to solve. The answer shown to the
right will be displayed.
*
z indicates statistics and P indicates probability.
EL-9650-(07)En (178-196)
8/1/00, 9:08 AM
185
Summary of Contents for EL-9650
Page 10: ...viii ...
Page 46: ...36 CHAPTER 1 ...
Page 230: ...220 CHAPTER 9 ...
Page 268: ...258 CHAPTER 12 ...
Page 349: ...339 APPENDIX When coordinate system is Rect param or polar ...
Page 350: ...340 APPENDIX When coordinate system is Seq F STYLE2 E STYLE1 ...
Page 352: ...342 APPENDIX ...
Page 353: ...343 APPENDIX on Program screen ...
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