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Lecture 26

# ECON 2209 Lecture 26: 3April_EconStats_Karagodsky Premium

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School
Boston College
Department
Economics
Course
ECON 2209
Professor
Karagodsky
Semester
Fall

Description
EconStats Notes 3 April 2017 How to get thresholds of Chi distributions Formula 1: 2 2 (n 1)s 2 P( n1;1 2 2 n1; 2) Formula 2: 2 2 P( (n 1)s (n 1)s ) x2 X 2 n1; 2 n1;1 2 Box Weights You have 7 boxes tPat weight 725, 780, 781, 795, 803, 810, 823. You know that = 5;s =2 1 (x ) = 315:5719. Find the range. n1 (n 1)s2 (n 1)s2 [ ; ] x2 x2 n1; 2 n1;1 2 (7 1)315:5719 ;7 1)315:5719 14:449 1:237 note: 14.449 and 1.237 are from the chi squared chart 1
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