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A time slip is a plot device in fantasy and science fiction in which a person, or group of people, seem to travel through time by unknown means. [12] [13] The idea of a time slip has been used in 19th century fantasy, an early example being Washington Irving's 1819 Rip Van Winkle, where the mechanism of time travel is an extraordinarily long sleep. [14]
In some cases, the data sets are paired, meaning there is an obvious and meaningful one-to-one correspondence between the data in the first set and the data in the second set, compare Blocking (statistics). For example, paired data can arise from measuring a single set of individuals at different points in time. [1]
A paired difference test, better known as a paired comparison, is a type of location test that is used when comparing two sets of paired measurements to assess whether their population means differ. A paired difference test is designed for situations where there is dependence between pairs of measurements (in which case a test designed for ...
Love Story 2050: Harry Baweja: About time travel to a utopian Mumbai in 2050 India. 2008 Minutemen: Lev L. Spiro: Three high-school outcasts use a time machine to save their classmates from embarrassing moments. Their time travel creates a black hole, which could destroy the world. A Disney Channel Original Movie. 2008 Stargate: Continuum ...
For partially paired data, the classical independent t-tests may give invalid results as the test statistic might not follow a t distribution, while the dependent t-test is sub-optimal as it discards the unpaired data. [21] Most two-sample t-tests are robust to all but large deviations from the assumptions. [22]
The Lord of the Rings was preceded in Tolkien's writings by two unfinished time-travel novels, The Lost Road, begun in 1936–37, [13] and The Notion Club Papers, begun c. 1945. [14] [15] Both texts make use of variants of the character Ælfwine to provide a frame story for the time travel, and indeed
Stating that it and other Heinlein time-travel stories "force the reader into contemplations of the nature of causality and the arrow of time", Carl Sagan listed "By His Bootstraps" as an example of how science fiction "can convey bits and pieces, hints and phrases, of knowledge unknown or inaccessible to the reader". [6]
Asimov's Science Fiction: 2007 Time and Stars: Poul Anderson: 1964 Time Considered as a Helix of Semi-Precious Stones: Samuel R. Delaney: 1968 Time Enough: Damon Knight: Amazing Science Fiction Stories: 1960 Time's Arrow (short story) Arthur C. Clarke: Science Fantasy: 1950 Titanium Mike Saves the Day: David D. Levine: Fantasy & Science Fiction ...