Examlex
Insects use ____ as a respiratory system.
χ
This commonly represents the Greek letter chi, which can denote a variable, statistic, or characteristic in various scientific fields. Without further context, a specific definition cannot be provided.
Negative Values
Numbers that are less than zero, often representing a deficit or decrease in mathematical calculations or data sets.
Student t
A probability distribution used in small-sample hypothesis testing and in constructing confidence intervals when the population standard deviation is unknown.
Number
An abstract concept representing a quantity or value used in counting, measuring, and calculations.
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