Z = (score-mean)/SEm
SEm = SD/√n
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.95) and its Z score. Insert Z score into top equation to calculate score.
In a recent year, Delaware had the highest per capita annual income with $51,803. If o=$4850, find the mean X that falls at the 95th percentile for a sample of 35 residents.
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