Round number
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A round number is an
In
Numbers can also be considered "round" in
Psychology and sociology
Psychologically, round numbers form
Culture
Round-number anniversaries are often especially celebrated. For example, a fiftieth birthday, the centenary of an event, or the millionth visitor or customer to a location or business.
On January 1, 2000, the round-number year 2000 was widely celebrated. Technically, the 3rd millennium did not begin until January 1, 2001, a year later, as there is no year zero in the Gregorian calendar.
Round number bias
Round number bias is the
Round number bias has been observed mainly in retail and
Round numbers are often used when estimating the time taken to complete a task.[11]
Mathematics
A round number is mathematically defined as an integer which is the product of a considerable number of comparatively small factors[12][13] as compared to its neighboring numbers, such as 24 = 2 × 2 × 2 × 3 (4 factors, as opposed to 3 factors for 27; 2 factors for 21, 22, 25, and 26; and 1 factor for 23).
See also
- Rounding
- Rounding fraud
- Significant figures
- Smooth number
- Unix billennium
References
- ^ Sadock, J. M. (1977). Truth and approximation. Berkeley Linguistics Society Papers 3: 430–439.
- ^ a b Ferson, S., J. O'Rawe, A. Antonenko, J. Siegrist, J. Mickley, C. Luhmann, K. Sentz, A. Finkel (2015). Natural language of uncertainty: numeric hedge words. International Journal of Approximate Reasoning 57: 19–39.
- ^ de Lusignan, S., J. Belsey, N. Hague and B. Dzregah (2004). End-digit preference in blood pressure recordings of patients with ischaemic heart disease in primary care. Journal of Human Hypertension 18: 261–265.
- ^ Bikos, Konstantin. "When Did the 21st Century Start?". timeanddate.com. Archived from the original on 18 December 2020. Retrieved 29 December 2020.
- ^ a b Vižintin, Žiga (6 February 2018). "Why Five and Not Eight? How Round Number Bias Can Reduce Your Nest Egg". Behavioral Scientist. Archived from the original on 4 August 2020. Retrieved 29 December 2020.
- ^ "How Round Number Bias and Psychological Pricing Affect Your Gains and Spending". Don't Quit Your Day Job. 19 June 2017. Archived from the original on 29 December 2020. Retrieved 29 December 2020.
- ^ Vižintin, Žiga (6 February 2018). "Why Five and Not Eight? How Round Number Bias Can Reduce Your Nest Egg". Behavioral Scientist. Archived from the original on 4 August 2020. Retrieved 29 December 2020.
- from the original on 29 December 2020. Retrieved 21 January 2021 – via cairn.info.
- CiteSeerX 10.1.1.670.6061. Archived from the original on 29 December 2020. Retrieved 21 January 2021 – via CiteSeerX.
- ^ L. Ross, Stephen; Zhou, Tingyu (3 November 2020). "Documenting Loss Aversion using Evidence of Round Number Bias" (PDF). University of Connecticut: 2. Archived from the original (PDF) on 29 December 2020 – via uconn.edu.
- ^ "Estimating in round numbers". Retrieved 9 August 2021.
- ^ "MathWorld's definition of a round number". Retrieved 3 May 2012.
- ^ Hardy, G. H. (1999). "Round Numbers." Ch. 3 in Ramanujan: Twelve Lectures on Subjects Suggested by His Life and Work, 3rd ed. New York: Chelsea, pp. 48–57.