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Across North America, the classes have often been based on enrollment levels of the schools, with many leagues using classifications named A, AA, AAA, etc. Classes [ edit ]
The top grade, A, is given here for performance that exceeds the mean by more than 1.5 standard deviations, a B for performance between 0.5 and 1.5 standard deviations above the mean, and so on. [17] Regardless of the absolute performance of the students, the best score in the group receives a top grade and the worst score receives a failing grade.
The letters B and b represent alleles for colour and the pictures show the resultant flowers. The diagram shows the cross between two heterozygous parents where B represents the dominant allele (purple) and b represents the recessive allele (white). Traits that are determined exclusively by genotype are typically inherited in a Mendelian pattern.
The difference between rates for first-class government bonds and investment-grade bonds is called investment-grade spread. The range of this spread is an indicator of the market's belief in the stability of the economy. The higher these investment-grade spreads (or risk premiums) are, the weaker the economy is considered.
PIAA's older logo PIAA's current logo. The PIAA was founded in Pittsburgh on December 29, 1913. It is charged with serving its member schools and registered officials by establishing policies and adopting contest rules that emphasize the educational values of interscholastic athletics, promote safe and sportsmanlike competition, and provide uniform standards for all interscholastic levels of ...
Investigators are intensifying their search into what caused the collision between American Airlines Flight 5342 and an Army Black Hawk helicopter, with recovery crews still working to pull ...
2, [1] or A–a gradient), is a measure of the difference between the alveolar concentration (A) of oxygen and the arterial (a) concentration of oxygen. It is a useful parameter for narrowing the differential diagnosis of hypoxemia. [2] The A–a gradient helps to assess the integrity of the alveolar capillary unit.
Enjoy a classic game of Hearts and watch out for the Queen of Spades!