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The current is proportional to the magnetization of the sample - the greater the induced current, the greater the magnetization. As a result, typically a hysteresis curve will be recorded [5] and from there the magnetic properties of the sample can be deduced. The idea of vibrating sample came from D. O. Smith's [6] vibrating-coil magnetometer.
19th-century soap manufacturer Benjamin T. Babbitt was one of the first known people, though not the first ever, to offer free samples of his products. For example, innkeepers are portrayed offering free samples in the 14th-century poem Piers Plowman: "Tauerners 'a tast for nouht' tolden the same" (Innkeepers said the same thing, 'A taste for free!').
A postman collecting mail for delivery. The mail or post is a system for physically transporting postcards, letters, and parcels. [1] A postal service can be private or public, though many governments place restrictions on private systems.
Larger samples are taken in the strata with the greatest variability to generate the least possible overall sampling variance. A real-world example of using stratified sampling would be for a political survey. If the respondents needed to reflect the diversity of the population, the researcher would specifically seek to include participants of ...
Example of biased sample: as of June 2008 55% of web browsers (Internet Explorer) in use did not pass the Acid2 test. Due to the nature of the test, the sample consisted mostly of web developers. [16] A classic example of a biased sample and the misleading results it produced occurred in 1936.
From 1938, the Kennkarte (Identification card) in the German Reich served as a precursor to the modern-day Personalausweis (Identity card). The Kennkarte was the basic identification document used during the Third Reich era in Germany. It was compulsory for German men of conscription age, and compulsory for local border traffic. [6]
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