Advanced Placement (AP), 16.12.2021 04:50, bella7524
A newspaper editor wants to investigate whether the residents of two counties support the proposal to build a
wind farm. She plans to take an SRS of 30 residents from the southern county and 40 residents from the
northern county, then look at the difference (southern - northern) between the proportions of residents
that support the proposal in each sample. Suppose that 65% of the residents of the southern county and 52%
of the residents of the northern county approve.
What are the mean and standard deviation of the sampling distribution of the difference in sample
proportions?
Answers: 2
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