Mathematics, 18.12.2019 17:31 Wanna14ever
The following 5 questions are based on this information: 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. col1 city 1 x1(bar)=164 σ(1)=12.5 n(1)=35col2 city 2 x2 (bar) =159 σ(2) =9.25 n2=30let μ(1) be the mean weekly food expenditure for city 1 and μ(2) be that for city 2.1. to test the economist’s claim, the competing hypotheses should be formulated asselect one: a. h0: μ1-μ2> 0 versus ha: μ1-μ2≤0b. h0: μ1-μ2≥0 versus ha: μ1-μ2< 02.the standard error of x(1)bar- x(2) bar isselect one: a. 0.82b. 2.70c. 12.5d. 9.253.the value of the test statistics isselect one: a. 0.40b. 1.85c. 0.54d. 27.784. the p-value of the test is
select one:
a. 0.34
b. 0.03
c. 0.29
d. 0.08
5.at α=0.05,
select one:
a. we can reject h(0) in favor of h(a)
b. we cannot reject h(0)
c. we can conclude that average weekly food expenditures in city 1 is less than that of city 2
Answers: 2
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