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Author Question: The z-test approximation to the Wilcoxon signed rank test is used whenever the number of nonzero ... (Read 83 times) |
There are more bacteria in your mouth than there are people in the world.
The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
Aspirin may benefit 11 different cancers, including those of the colon, pancreas, lungs, prostate, breasts, and leukemia.
When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).
The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.