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If random samples of the given sizes are drawn from populations with the given proportions, find the mean of the distribution of differences in sample

If random samples of the given sizes are drawn from populations with the given proportions, find the mean of the distribution of differences in sample proportions, P1-P2.

n1=230 from p1=0.4 and n2=230fromp2=0.7

Round your answers to three decimal places, if necessary.

mean =

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