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2. Standard normal table - Wikipedia

   en.wikipedia.org/wiki/Standard_normal_table

   Standard normal table. In statistics, a standard normal table, also called the unit normal table or Z table, [ 1 ] is a mathematical table for the values of Φ, the cumulative distribution function of the normal distribution. It is used to find the probability that a statistic is observed below, above, or between values on the standard normal ...

3. Europium - Wikipedia

   en.wikipedia.org/wiki/Europium

   Europium. body-centered cubic (bcc) (cI2) Europium is a chemical element; it has symbol Eu and atomic number 63. Europium is a silvery-white metal of the lanthanide series that reacts readily with air to form a dark oxide coating. It is the most chemically reactive, least dense, and softest of the lanthanide elements.

4. Dunning–Kruger effect - Wikipedia

   en.wikipedia.org/wiki/Dunning–Kruger_effect

   The Dunning–Kruger effect is defined as the tendency of people with low ability in a specific area to give overly positive assessments of this ability. [2][3][4] This is often seen as a cognitive bias, i.e. as a systematic tendency to engage in erroneous forms of thinking and judging. [5][6][7] In the case of the Dunning–Kruger effect, this ...

5. Caesium-137 - Wikipedia

   en.wikipedia.org/wiki/Caesium-137

   Caesium-137 (137. 55Cs. ), cesium-137 (US), [7] or radiocaesium, is a radioactive isotope of caesium that is formed as one of the more common fission products by the nuclear fission of uranium-235 and other fissionable isotopes in nuclear reactors and nuclear weapons. Trace quantities also originate from spontaneous fission of uranium-238.