critical value(redirected from Na+)
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critical value[′krid·ə·kəl ′val·yü]
The value of the dependent variable at a critical point of a function.
A number which causes rejection of the null hypothesis if a given test statistic is this number or more, and acceptance of the null hypothesis if the test statistic is smaller than this number.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.