A gasoline distributor wonders whether an individual's income level influences the grade of gasolinepurchased. The following is a contingency table from a random sample of 300 individuals.PersonalType of GasolineIncomeExtraRegular PremiumPremiumLess than$50,000803030$50,000 orMore704050Using a- .05, observed chi-square value isO 5.79O 51.79O 32.89O 4.44O 15.79

The question is based on categorical data analysis using chi square test Given :

Answered: Personal Type of Gasoline Income Extra…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Personal Type of Gasoline Income Extra Regular Premium Premium Less than $50,000 80 30 30 $50,000 or More 70 40 50 Using a-.05, observed chi-square value is