Stat 311 Chapter 11.1 Hypothesis Test and Estimation for a Single Population Variance.pptx - Hypothesis Tests and Estimation for Population Variances

# Stat 311 Chapter 11.1 Hypothesis Test and Estimation for a Single Population Variance.pptx

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11-1 Hypothesis Tests and Estimation for Population Variances
11-2 11.1 Hypothesis Tests and Estimation for a Single Population Variance When measuring variation, the standard deviation is used as the measure because it is measured in the same units as the mean There is no statistical test directly tests the standard deviation The chi-square test that can be used to test the population variance
Hypothesis for a Single Population Variance 11-3
Hypothesis for a Single Population Variance 11-4
Chi-Square Test for a Single Population Variance 11-5
Finding the Critical Value The critical value, , is found from the chi-square table 11-6 Do not reject H 0 Reject H 0 2 2 2
Hypothesis Tests for a Single Population Variance 11-7 Hypothesis Tests for Population Variance Don’t reject H 0 Reject H 0 2 Don’t reject H 0 Don’t reject H 0 Reject H 0 Reject H 0 2 2 Reject H 0 2 2 1 /2 2 / 2 2 1
Hypothesis Tests for a Single Population Variance 11-8

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