BIS 104 PQ 9 ans Spring 2010

BIS 104 PQ 9 ans Spring 2010 - That is what is the...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
BIS 103 PQ 9 ans Spring 2010 9. In a true scientific investigation, experiments designed to test a hypothesis must be accompanied by appropriate controls. a. Why are control experiments necessary for the proper intrepretation of experimental results? Controls are necessary to rule out alternative possibilities for the cause of an observed result. For each variable introduced in an experimental procedure, a control must be performed to make sure that a particular variable did not contribute to the observed result. b. What is the difference between a positive and negative control?
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: That is, what is the definition of a “positive control”? The definition of a “negative control”? Negative controls are experifments that are designed to specifically rule out the controbution of extraneous variables. That is, to determine what is not the cause of the result. Positive controls are experiments that verify that the experimental techniques actually work the way they are supposed to, and to reassure investigators that they are measuring exactly what they think they are measuring....
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online