A sample of five law firms has been selected from each of three major cities for the purpose of obtaining a quote for legal services on a relatively routine business contract. The quotes provided by the fifteen firms are as shown in the accompanying table. At the 0.05 level of significance, does it seem that the population median bids from the cities’ firms could be the same?
Answer to relevant QuestionsIn testing three different rubber compounds, a tire manufacturer finds the tread life of tires made from each to be as shown below. At the 0.05 level, could the three compounds deliver the same median tread life? The randomized block design has been used in comparing the effectiveness of three treatments, with the data as shown in the table. Using the 0.05 level of significance, can we conclude that the treatments are equally ...Whether testing a single sample or comparing paired samples, how should one go about deciding whether to use the sign test versus the Wilcoxon signed rank test? Franchise headquarters claims it randomly selected the local franchises that received surprise visits during the past year. The sequence of visits is as shown below for male (M) versus female (F) managers. Using the 0.10 ...According to R.L. Polk & Company, the median age of automobiles and trucks on the road in the United States is about 9 years. The ages for a random sample of vehicles in the executive parking lot of a metal fabrication ...
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