Credit:Martin BarraudStoneGetty Images

Q:A:### Quick Answer

**A probabilistic system is one where events and occurrences cannot be predicted with precise accuracy.** It is contrasted by a deterministic system in which all events can be predicted with certainty.

In a probabilistic system, unlike in a deterministic system, what has just occurred is not always an accurate predictor of what will transpire next. The weather, for example, is a probabilistic system, in that future events can only be imperfectly predicted.

The theory of probabilistic systems by extension leads to probabilistic analysis and forecasting. A probabilistic system must be analyzed according to the various possible outcomes and their relative probability of occurrence.

Learn more about StatisticsSources:

- Q:
## What is the formula used to find a raw score?

A:

Full Answer >**The formula to find a raw score is x = x_bar + z * s.**X represents the raw score, x_bar is the mean, z is the z-score and s is the standard deviation. To determine the raw score, these values must be known.Filed Under: - Q:
## What is the definition of parametric testing?

A:

Full Answer >**Parametric testing is defined by making one or more assumptions about the population's properties.**The most common assumptions to make are that the population will be normally distributed or have data based on an equal-interval scale.Filed Under: - Q:
## How do you calculate the geometric mean?

A:To calculate geometric mean for a set of numbers, multiply the numbers together, and take the nth root of this product. Only calculate the geometric mean when all of the numbers in a set are nonzero and positive.

Full Answer >Filed Under: - Q:
## What is the different between nCr and nPr?

A:

Full Answer >**A person uses nPr when the order matters, and they use nCr when order does not matter or for combinations.**Someone would use these functions when performing probability math problems.Filed Under: