Category: Probability & Statistics

Standard deviation is a measure of spread that helps us to interpret data.  Together with the mean, standard deviation can tell us a lot about the data, and the units can also help us to...

A parameter tells us about an entire population - for example, population mean is a parameter.  However, we cannot always poll the entire population, which is where a statistic comes in. So,...

Conditional probability is a concept that helps us to apply new knowledge when we are making predictions or calculating probabilities.  It relates two events and the probability of one or both...

Confidence intervals are an important concept in statistics.  They help us to make estimates by using the data we have available, and they tell us how much confidence we have in the calculated...

Independent or mutually exclusive events are important concepts in probability theory.  They help us to find the connections between events and to calculate probabilities. So, what is the...

Rolling two six-sided dice, taking the sum, and examining the possible outcomes is a common way to learn about probability.  Tables and charts are often helpful in figuring out the outcomes and...