The average number of article produced by two machines per day 270 and 340 with standard deviations 30 and 35 respectively on the basis of records of 28 days productions. Can you regard both machines equally efficient at 1% level of significance?
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What is the percent composition of oxygen in water? *Abstract. This paper models the rural-urban spatial transformation that occurs with urbanization, as driven by economic and population growth. This transformation involves the agglomeration of populations into cities, with increasing numbers of cities and increasing populations of individual cities.
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