ex0729 {Sleuth3}

Sampling Bias in Exit Polls

Description

These data are the number of percentage points by which exit polls over estimated the actual vote for candidate John Kerry in the 2004 U.S. presidential election, grouped according to the distance of the exit poll interviewer from the door of the polling location. How strong is the evidence that the mean Kerry overestimate increases with increasing distance of interviewer from the door (thus lending evidence to the theory that supporters of the other candidate, George W Bush, were more inclined to avoid exit pollsters)?

Usage

ex0729

Format

A data frame with 6 observations on the following 2 variables.

OverEstimate

number of percentage points by which the exit poll estimate exceeded the actual percentage voting for Kerry (in all precincts with a similar distance of interviewer from the door

Distance

distance of the interviewer from the door of the polling location, in feet

Source

Ramsey, F.L. and Schafer, D.W. (2013). The Statistical Sleuth: A Course in Methods of Data Analysis (3rd ed), Cengage Learning.

References

Evaluation of Edison/Mitofsky Election System 2004 prepared by Edison Media Research and Mitofsky International for the National Election Pool (NEP), January 15, 2005. https://abcnews.go.com/images/Politics/EvaluationofEdisonMitofskyElectionSystem.pdf

See Also

ex0730

Examples

str(ex0729)