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Sensitivity (true positive rate) is the probability of a positive test result, conditioned on the individual truly being positive. Specificity (true negative rate) is the probability of a negative test result, conditioned on the individual truly being negative. If the true status of the condition cannot be known, sensitivity and specificity can ...
Charles John Huffam Dickens (/ ˈ d ɪ k ɪ n z /; 7 February 1812 – 9 June 1870) was an English novelist and social critic who created some of the world's best-known fictional characters, and is regarded by many as the greatest novelist of the Victorian era.
The 2021–22 NHL season was the 105th season of operation (104th season of play) of the National Hockey League (NHL). The league expanded to 32 teams with the addition of the Seattle Kraken. The league had an October-to-April regular season scheduling and a full 82-game regular season for the first time since the 2018–19 NHL season as the ...
Etymology. The term baby boom refers to a noticeable increase in the birth rate. The post-World War II population increase was described as a "boom" by various newspaper reporters, including Sylvia F. Porter in a column in the May 4, 1951, edition of the New York Post, based on the increase of 2,357,000 in the population of the U.S. from 1940 to 1950.
Ethanol is the oldest known sedative, used as an oral general anesthetic during surgery in ancient Mesopotamia and in medieval times. [15] [16] Mild intoxication starts at a blood alcohol concentration of 0.03-0.05 % and induces anesthetic coma at 0.4%. [24] However, this use carried the high risk of deadly alcohol intoxication and pulmonary ...
In 2021, the total fertility rate for the U.S. stood at 1.7 children per woman, and it had the world's highest rate of children (23%) living in single-parent households in 2019. As of 2023, the five most populous states in the nation are California (38.9 million), Texas (30.5 million), Florida (22.6 million), New York (19.5 million), and ...