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Reply #16: You cannot assign a probability to a sample? What do all posters do? [View All]

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TruthIsAll Donating Member (1000+ posts) Send PM | Profile | Ignore Thu Apr-14-05 04:16 PM
Response to Reply #7
16. You cannot assign a probability to a sample? What do all posters do?
Edited on Thu Apr-14-05 04:18 PM by TruthIsAll
They want to have a attain accuracy to within a pre-set MoE based on a desired confidence (PROBABILITY) level that the poll will produce a result within the MoE.

That's exactly how a pollster determines how many to sample.

You are so wrapped up in your spin that you ignore the lessons from the interactive sample-size calculator.

You have no clue as to the relationship between the required MoE and the confidence level.

You ignore the INPUT MoE.
That tells you how many you need to sample to achieve the accuracy you want.

You ignore the INPUT confidence level.
That tells you what the PROBABILITY is of the ACTUAL POPULATION mean of falling within the MoE.

You ignore the OUTPUT of the calculation:
THE REQUIRED SAMPLE SIZE TO SATISFY THE PRE-SET CONFIDENCE LEVEL THAT THE RESULT OF THE POLL WILL FALL WITHIN THE PRE-SET MARGIN OF ERROR.

You ignore everything.
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