Chapter 7 formulas

Chapter 7 formulas - Formulas Chapter Seven: Inferences...

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Formulas Chapter Seven: Inferences Based on a Single Sample; Estimation with Confidence Intervals Randall Miller 1 | Page Key Symbols o θ General population parameter (theta) o ˆ Estimator of o µ Population mean o σ Population standard deviation o p Population proportion; P (Success) in binomial trial o 1 qp →− o x Sample mean (estimator of ) o ˆ p Sample proportion (estimator of p ) o x True mean of sampling distribution of x o x True standard deviation of sampling distribution of x o ˆ p Standard deviation of the sampling distribution of ˆ p o SE Sampling error in estimation o α (1 - ) represents the confidence coefficient o /2 z z -values used in a ( ) 100 1 % large-sample confidence interval o t Student’s t -value used in a ( ) 100 1 % small-sample confidence interval Formulas Large-Sample ( ) α 100 1- % Confidence Interval for The large-sample ( ) 100 1 % confidence interval for is x xz n αα ±= ± where z is the z value with an area to its right (see Figure 7.4) and
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This note was uploaded on 07/23/2011 for the course STA 3123 taught by Professor Staff during the Fall '08 term at FIU.

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Chapter 7 formulas - Formulas Chapter Seven: Inferences...

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