Question: Radio advertisements have been stressing the virtues of an audiotape program to help children learn to read. To test whether this tape program can cause a quick improvement in reading ability, 10 children were given a nationally recognized reading test that measures reading ability. The same 10 children were then given the tapes to listen to for 4 hours spaced over a 2-day period. The children then were tested again. The test scores were as follows:
If higher scores are better, use the Wilcoxon matched pairs signed rank test to test whether this tape program produces quick improvement in reading ability. Use an = 0.025.