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The mean corpuscular hemoglobin concentration (MCHC) is a measure of the concentration of hemoglobin in a given volume of packed red blood cell. It is calculated by dividing the hemoglobin by the hematocrit. Reference ranges for blood tests are 32 to 36 g/dL (320 to 360g/L), [1] or between 4.81 and 5.58 mmol/L. It is thus a mass or molar ...
Polycythemia is defined as serum hematocrit (Hct) or hemoglobin (HgB) exceeding normal ranges expected for age and sex, typically Hct >49% in healthy adult men and >48% in women, or HgB >16.5 g/dL in men or >16.0 g/dL in women. [8] The definition is different for neonates and varies by age in children. [9] [10]
Of all probability distributions over the reals with a specified finite mean and finite variance , the normal distribution (,) is the one with maximum entropy. [29] To see this, let X {\textstyle X} be a continuous random variable with probability density f ( x ) {\textstyle f(x)} .
Canada's fertility rate hit a record low of 1.4 children born per woman in 2020, [30] below the population replacement level, which stands at 2.1 births per woman. In 2020, Canada also experienced the country's lowest number of births in 15 years, [ 30 ] also seeing the largest annual drop in childbirths (−3.6%) in a quarter of a century. [ 30 ]
Winters are cold, with 22 days where the high temperature is at or below 32 °F (0 °C) and 2.5 nights with a low at or below 0 °F (−18 °C). [51] The official record highest temperature is 113 °F (45 °C), set on August 14, 1936, at Downtown Airport, while the official record lowest is −23 °F (−31 °C), set on December 22 and 23, 1989 ...
A standard wire gauge. American Wire Gauge (AWG) is a logarithmic stepped standardized wire gauge system used since 1857, predominantly in North America, for the diameters of round, solid, nonferrous, electrically conducting wire.
Mecca has been referred to by many names. As with many Arabic words, its etymology is obscure. [24] Widely believed to be a synonym for Makkah, it is said to be more specifically the early name for the valley located therein, while Muslim scholars generally use it to refer to the sacred area of the city that immediately surrounds and includes the Ka'bah.
Frost usually occurs in the early winter mornings, and there is a slight wind chill in the city at elevated areas that causes the cold mornings to be bitter, including low humidity. The sun warms the city to the high 20–22 °C (68–72 °F) during the noontime but it drops drastically after nightfall to a low around 3–4 °C (37–39 °F).