Dif in Means -- Unequal Sigmas

# Dif in Means -- Unequal Sigmas - DIFFERENCE IN POPULATION...

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DIFFERENCE IN POPULATION MEANS WITH UNKNOWN, BUT UNEQUAL VARIANCES Given: From The F-test, it has been concluded that we can assume different (unequal) variances Test: H 0 : μ 1 - μ 2 = 2000 H 1 : μ 1 - μ 2 > 2000 Go to Tools Select Data Analysis Select t-Test: Two-Sample Assuming Unequal Variances

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Hypothesized Mean Difference: H 1 : μ 1 - μ 2 > 2000 p-value for one–tail (>) test: .01172 There is enough evidence (with α = .05) to conclude that: μ 1 - μ 2 > 2000
+ - - 2 2 2 1 , 025 . 2 1 ) ( s s t x x DF CONFIDENCE INTERVAL FOR : μ 1 - μ 2 The lower confidence limit (LCL) for the 95% interval is:
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## This note was uploaded on 08/29/2011 for the course STATISTICS 361 taught by Professor Gupta during the Spring '11 term at California State University , Monterey Bay.

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Dif in Means -- Unequal Sigmas - DIFFERENCE IN POPULATION...

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