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Definition of Alternative hypothesis

Alternative hypothesis Definition from Business & Finance Dictionaries & Glossaries
Sean_Woo's Finance,GIS & Real Estate Glossary
a claim about a population parameter that will be true if the null hypothesis is false.
Raynet Business & Marketing Glossary
in research, a statement that suggests a difference or an effect is present (i.e. there is an alternative). The alternative hypothesis is adopted when the null hypothesis has been disproved.
Copyright © 2001, Ray Wright
Alternative hypothesis Definition from Encyclopedia Dictionaries & Glossaries
Wikipedia English - The Free Encyclopedia
In statistical hypothesis testing, the alternative hypothesis (or maintained hypothesis or research hypothesis) and the null hypothesis are the two rival hypotheses which are compared by a statistical hypothesis test. An example might be where water quality in a stream has been observed over many years and a test is made of the null hypothesis that there is no change in quality between the first and second halves of the data against the alternative hypothesis that the quality is poorer in the second half of the record.

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Alternative hypothesis Definition from Medicine Dictionaries & Glossaries
Glossary of Epidemiology Terms
The hypothesis, to be adopted if the null hypothesis proves implausible, in which exposure is associated with disease.