Probability Distribution Quiz

A table or function that shows the probability of each possible outcome for a variable.

The average value of a random variable, calculated by summing each outcome multiplied by its probability.

A measure of the spread or dispersion of a probability distribution.

The average of the squared differences from the mean.

The chance or likelihood of an event occurring.

A possible result of an event or experiment.

The random variable representing the number of men living through the year.

Probability of 'x' men living through the next year.

Σ (x * P(x))

Σ [(x - mean)^2 * P(x)]

Square root of the variance.

Tool for calculating mean and standard deviation, faster than manual calculation.

Tool for arithmetic operations, including the calculations needed for standard deviation and mean.

Sigma, symbol for summation.

A variable whose value is a numerical outcome of a random phenomenon.

Data that shows chances for various results of an event, in a suitable format.

A calculated result that is a number; e.g. a quantity that shows a certain value.

An event with uncertain outcomes. Eg: Rolling a dice.

A table that lists all possible outcomes of an event and their probabilities

Involves summarizing the probabilities of each outcome, multiplied by the associated values

Requires the variance of the outcomes, calculated from the mean.

The average outcome in a probability distribution. Multiply each outcome by its probability, then add up the results.

A higher standard deviation indicates that the data is more spread out around the mean. A lower standard deviation means the data points are closer to the average outcome.