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ERIC Number: EJ878031
Record Type: Journal
Publication Date: 2010-Jan
Pages: 5
Abstractor: As Provided
Reference Count: 6
ISBN: N/A
ISSN: ISSN-0887-2376
Is Knowledge Random? Introducing Sampling and Bias through Outdoor Inquiry
Stier, Sam
Science Scope, v33 n5 p45-49 Jan 2010
Sampling, very generally, is the process of learning about something by selecting and assessing representative parts of that population or object. In the inquiry activity described here, students learned about sampling techniques as they estimated the number of trees greater than 12 cm dbh (diameter at breast height) in a wooded, discrete area (approximately one acre) close to school, in 15 minutes. Trees were chosen as the study organism because they are stationary (thus easily sampled), their population is constant over a long period of time, and they are prominent natural elements of the environment. (Contains 6 figures.)
National Science Teachers Association. 1840 Wilson Boulevard, Arlington, VA 22201-3000. Tel: 800-722-6782; Fax: 703-243-3924; e-mail: membership@nsta.org; Web site: http://www.nsta.org
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Grade 8
Audience: Teachers
Language: English
Sponsor: N/A
Authoring Institution: N/A