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Business, 27.06.2019 03:50 Emiann222

An economist claims that average weekly food expenditure of households in city 1 is more than that of households in city 2. she surveys 35 households in city 1 and obtains an average weekly food expenditure of $164. a sample of 30 households in city 2 yields an average weekly expenditure of $159. historical data reveals that the population standard deviation for city 1 and city 2 are $12.50 and $9.25, respectively. to test the economist's claim, the competing hypotheses should be formulated as

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