# Ch. 19 Confidence Intervals

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Information about Ch. 19 Confidence Intervals

Published on February 20, 2009

Author: christjt

Source: slideshare.net

## Description

Calculation of confidence intervals is presented. Also included is determining sample size for a most conservative estimate. Many other topics dealing with the normal model are demonstrated.

POPULATION p = ??? SAMPLE Construct an interval to determine p. Conditions must be met. 1. Take a sample 2. Get sample statistic (p-hat) 3. Determine standard error (root[(p-hat)(q-hat)/n]) 4. Determine margin of error (using critical value) 5. Construct interval p-hat +/- S.E.(p-hat)

POPULATION p = ??? SAMPLE Construct an interval to determine p. Conditions must be met. 1. Take a sample 2. Get sample statistic (p-hat) 3. Determine standard error (root[(p-hat)(q-hat)/n]) 4. Determine margin of error (using critical value) 5. Construct interval p-hat +/- S.E.(p-hat)

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