10.3 Matched Samples

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Unformatted text preview: kly UPX INTEX Difference distributed to Vancouver 32 25 7 district offices throughout Victoria 30 24 6 Canada. The Ottawa 19 15 4 firm must Toronto 16 15 1 decide between two delivery Montreal 15 13 2 services, UPX need the Calgary to know18 mean 15 3 and INTEX, to (i.e., Halifax point estimate) and 14 15 –1 transport its standard deviation of the documents. Sudbury 10 8 2 difference: How can the Brandon 9 –2 mean: 2.77 company Edmonton 16 5 standard deviation:1 determine which Example What is the 95% confidence interval for the mean difference between the services? Hypothesis Tests A Winnipeg The firm sent two copies of documents, one by Interval Estimate:delivery service, to a random sample of 10 based company each has documents district offices. See the data in the table below: that must be d ± t sd , df = n − 1 α2 n Office quickly UPX INTEX Difference distributed;to sd = 2.91; df = 9; t 0.05 2 = 1.83 d = 2.7 Vancouver 32 25 7 district offices throughout Victoria 30 24 6 Canada. The Ottawa 19 15 4 firm m...
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This document was uploaded on 03/05/2014.

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