Dante Development Corporation is considering bidding on a contract for a new office building complex. Figure 4.17 shows the decision tree prepared by one of Dante’s analysts. At node 1,….
Does the analysis in part (b) lead to the same conclusion as the Wilcoxon signed-rank test? Why or why not?
The sample data table Chamber.jmp represents electrical measurements on 24 electrical boards. (This is the same data used in “Paired Means: The Wilcoxon Signed-Rank Test” on page 211.) Each measurement was taken when soldering was complete and then again three weeks later after sitting in a temperature- and humidity-controlled chamber. The investigator wants to know if there is a difference between the measurements.
(a) Why is this a situation that calls for a matched-pairs analysi?
(b) Using the paired t-test, determine if there is a significant difference between the means when the boards were outside versus. inside the chamber.
(c) Does the analysis in part (b) lead to the same conclusion as the Wilcoxon signed-rank test? Why or why not?