**Bar graph** is a graphical representation of the frequency distribution or relative frequency distribution of qualitative data.

**Binomial distribution function** is a probability distribution representing a dichotomous variable with a constant probability of occurrence.

**Box plot** is a graphical representation of several basic descriptive statistics in a concise manner.

**Categorical variable** contains qualitative values.

**Center of gravity** of the data is the same as the expected value, or mean.

**Central limit theorem** states that in repeated random samples from a population, the sample means will have a normal distribution function; the expected value of the sample mean is equal to the true value of the population mean, and the variance of the sample ...

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