Sampling_Distribution_(continued)

# Sampling distribution of the sample proportion

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Unformatted text preview: that the pollsters are 95% conﬁdent that the true proportion ( of adults who believe in life after death) is within ±ME % = ±2.4% of the estimated proportion. Sampling Distribution of the Sample Proportion (continued Checkpoint 3 - Modeling and Inference Sampling Distribution of the Sample Proportion Example A poll of 120 adults found that 38% of the sample said that they believe in the existence of life after death. 1. Find the margin or error for this poll if we want 95% conﬁdence in our estimate of the percent of adults who believe in life after death. ∗ ME = zα /2 ∗ ˆ ˆ p (1 − p ) n 2. Explain what the ME means. The margin of error means that the pollsters are 95% conﬁdent that the true proportion ( of adults who believe in life after death) is within ±ME % = ±2.4% of the estimated proportion. Sampling Distribution of the Sample Proportion (continued Checkpoint 3 - Modeling and Inference Sampling Distribution of the Sample Proportion Example 3. If we want a 99% conﬁdent, will the margin of error be larger or smaller? 4. Find the ME...
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## This note was uploaded on 03/12/2014 for the course STATS 10 taught by Professor Ioudina during the Spring '08 term at UCLA.

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