26 victoria 10 canada the ottawa 19 15 4 27 208 firm

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Unformatted text preview: the Brandon 7 9 –2 company Edmonton 6 1 5 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 a2 n quickly Office UPX INTEX Difference distributed; tosd = 2.91; df = 9; t 0.05 2 = 2.26 d = 2.7 Vancouver 32 25 7 district offices 2.91 throughout 30 24 6 2.7 ± 2.26 Victoria 10 Canada. The Ottawa 19 15 4 2.7 ± 2.08 firm must 16 15 1 decide between .62 £ mD £ Toronto 0 4.78 two delivery Montreal 15 13 2 services, UPX Calgary 18 15 3 Therefore, and INTEX, to with 95% Halifax 15 –1 transport its confidence, we can say that 14 documents. Sudbury 8 2 the mean difference between 10 How can the 9 –2 the time UPX andBrandon take 7 INTEX company Edmonton 1 5 determine which between 0.62 and 6 to deliver is Hypothesis Tests about the Difference between Two Population Mea...
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