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5.5 Sampling Distributions for Sample Proportions
A polling organization wants to estimate the proportion of adults who support a new tax policy. Under what conditions would the sampling distribution of the sample proportion be approximately normal?
n ≥ 30, regardless of p
np ≥ 10 and n(1-p) ≥ 10
p must be exactly 0.5
The sample must be at least 10% of the population
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Presentation Slides, Combining Random Vairables
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Presentation Slides, Combining Random Vairables