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The medians were: 33,000 students enrollees; 2,600 passing; and 1 teaching assistant helping with the class. 74% of the classes used automated grading, and 34% used peer grading. 97% of the instructors used original videos, 75% used open educational resources and 27% used other resources. 9% of the classes required a physical textbook and 5% ...
Minute is a unit of time defined as equal to 60 seconds. [1] One hour contains 60 minutes. [2] Although not a unit in the International System of Units (SI), the minute is accepted for use in the SI. [1] The SI symbol for minutes is min (without a dot). The prime symbol ′ is also sometimes used informally to denote minutes. [3]
If the null hypothesis is true, the likelihood ratio test, the Wald test, and the Score test are asymptotically equivalent tests of hypotheses. [8] [9] When testing nested models, the statistics for each test then converge to a Chi-squared distribution with degrees of freedom equal to the difference in degrees of freedom in the two models.
Detailed data show 90% destruction in the northern and western parts of Wrocław, about 60% in the Old Town, and from 10% to 30% in the southern and eastern districts. [5] One of the few undamaged landmarks that welcomed the Polish arrivals to Wrocław after the war was the Chapel of Blessed Ceslaus, a 13th-century Dominican priory.
The combination of these networks reportedly drew a peak audience of over 33 million viewers of the half-hour program, making it the single most watched infomercial broadcast in the history of U.S. television. [74] Aside from blocking viewer choice, reception was not all positive: an NBC reviewer referred to Obama as having a "thin resume". [75]
The service is the largest digital distribution platform for PC games, with an estimated 75% of the market share in 2013 according to IHS Screen Digest. [2] By 2017, game purchases through Steam totaled about US$ 4.3 billion, or at least 18% of global PC game sales according to Steam Spy . [ 3 ]
In 2023, solar power generated 5.5% (1,631 TWh) of global electricity and over 1% of primary energy, adding twice as much new electricity as coal. [ 4 ] [ 5 ] Along with onshore wind power , utility-scale solar is the source with the cheapest levelised cost of electricity for new installations in most countries.
For example, 99 tons of waste is generated per ton of copper, with even higher ratios in gold mining – because only 5.3 g of gold is extracted per ton of ore, a ton of gold produces 200,000 tons of tailings. [72] (As time goes on and richer deposits are exhausted – and technology improves – this number is going down to .5 g and less.)