ENGR.ECONOMIC ANALYSIS
14th Edition
ISBN: 9780190931919
Author: NEWNAN
Publisher: Oxford University Press
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Transcribed Image Text:Question:
In a survey of buying habits, 400 women
shoppers are chosen at random in super
market 'A' located in a certain section of the
city. Their average weekly food expenditure is
dollar 250 with a standard deviation of Dollar
40. For 400 women shoppers chosen at
random in super market 'B' in another section
of the city, the average weekly food
expenditure is Dollar 220 with a standard
deviation of Dollar 55. Test at 1% level of
significance whether the average weekly food
expenditure of the two populations of
shoppers are equal.
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