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9.1. 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 Rs 250 with a standard deviation of Rs 40. For 400 women shoppers chosen at random in super-market 'B' in another section of the city, the average weekly food expenditure is Rs 220 with a standard deviation of Rs 55. Test at 1% level of significance whether the average weekly food expenditures of the populations of shoppers are equal.

9.1. 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 Rs 250 with a standard deviation of Rs 40. For 400 women shoppers chosen at random in super-market 'B' in another section of the city, the average weekly food expenditure is Rs 220 with a standard deviation of Rs 55. Test at 1% level of significance whether the average weekly food expenditures of the populations of shoppers are equal.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 8PPS
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7. 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 Rs 250 with a standard deviation of Rs 40. For 400 women shoppers chosen at random in super-market 'B' in another section of the city, the average weekly food expenditure is Rs 220 with a standard deviation of Rs 55. Test at 1% level of significance whether the average weekly food expenditures of the populations of shoppers are equal.
Transcribed Image Text:7. 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 Rs 250 with a standard deviation of Rs 40. For 400 women shoppers chosen at random in super-market 'B' in another section of the city, the average weekly food expenditure is Rs 220 with a standard deviation of Rs 55. Test at 1% level of significance whether the average weekly food expenditures of the populations of shoppers are equal.
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