What are variables?

Variables are things that we measure, control, or manipulate in research. They differ in many respects, most notably in the role they are given in our research and in the type of measures that can be applied to them.

Variables are key in scientific, geo-political and sociological studies.

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Our homework helpers work to cement these Probability and Statistics concepts through repetition. Oftentimes, when a student needs help with math, a comprehensive Probability and Statistics tutorial, in addition to our homework helpers, will help out significantly.

The Probability and Statistics Made Easy tutorial covers:

- Population and Data; Frequency and Distributions; Visual Display of Data; Mean
- Mode; Median and Midrange; Means, Medians and Modes of Grouped Data; Variance and Standard Deviation; Sample Space and Events
- Random Variables and Distributions; Continuous Random Variables; Expectations of Random Variables; Variance of Random Variables
- Independent Random Variables; Binomial Distribution; Poisson Distribution; Tchebychev's Approximation
- Normal Distribution and Distribution and Standardization; Central Limit Theorem; Normal Approximation to Binomial; Sampling Distribution of Mean