May 24, 2018...S) RLonb 01 IOOÇPSII blsÀGLe satŒq GAGIJ p!sasq suq bL0A!qsq s eolnuou. escu 01...
Transcript of May 24, 2018...S) RLonb 01 IOOÇPSII blsÀGLe satŒq GAGIJ p!sasq suq bL0A!qsq s eolnuou. escu 01...
May 23, 2018
bias
someone usesomeone
wordingbias free
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sampling method
notvariety
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lack
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alter
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survey
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http://www.raidersonline.org/lyle-alzado.php
Make the survey anonymous.
Response Bias.
Respondents are unlikely to answer truthfully.
*Random drug testing
is common in sports.
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Measurement Bias
Survey question limits options.
Allow the question to be open
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Sampling Bias
Golfers will likely be opposed.
Survey the community at large.
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Non-Response Bias
70% don't answer
Offer an incentive to complete the survey.
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Measurement Bias
Use hidden unmarked cars.
People drive slower when they see a police car
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- needs a variety of teenagers (in much larger numbers) that would accurately represent ALL teens.
- Friends -> Sampling bias
similar views
May 23, 2018
Practice: Handout