Simpsons paradox
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The direction of the relationship between two variables changes when the
categories of a confounding variable are taken into account
Systematic Sampling
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order the population of units in some way, self one of the first k units at
random and then every kth unit thereafter
, Random-Digit Dialing
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Methor approximates a simple random sample of all households in the US
that have telephones
The standard deviation of the sample
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s
The statistic for correlation
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r
Response Bias
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occurs when participants respond differently from how they truly feel
Give this one a try later!
The direction of the relationship between two variables changes when the
categories of a confounding variable are taken into account
Systematic Sampling
Give this one a try later!
order the population of units in some way, self one of the first k units at
random and then every kth unit thereafter
, Random-Digit Dialing
Give this one a try later!
Methor approximates a simple random sample of all households in the US
that have telephones
The standard deviation of the sample
Give this one a try later!
s
The statistic for correlation
Give this one a try later!
r
Response Bias
Give this one a try later!
occurs when participants respond differently from how they truly feel
