Probs & Stats Final Exam

Front

What is the probability of an event?

Back

The probability of an event is a measure of the likelihood that the event will occur, expressed as a number between 0 and 1.

Front

Define 'mean' in statistics.

Back

The mean is the average of a set of numbers, calculated by adding all the values together and dividing by the number of values.

Front

What is a normal distribution?

Back

A normal distribution is a probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.

Front

What does standard deviation measure?

Back

Standard deviation measures the amount of variation or dispersion in a set of values.

Front

Explain systematic sampling.

Back

Systematic sampling is a method of selecting samples from a population at regular intervals, such as every nth individual.

Front

What is the formula for calculating probability?

Back

Probability = (Number of favorable outcomes) / (Total number of outcomes).

Front

Define 'percentile'.

Back

A percentile is a measure used in statistics indicating the value below which a given percentage of observations fall.

Front

What is the difference between independent and dependent events in probability?

Back

Independent events are those whose outcomes do not affect each other, while dependent events are those where the outcome of one event affects the outcome of another.

Front

How do you calculate the probability of two independent events occurring?

Back

The probability of two independent events occurring is the product of their individual probabilities.

Front

What is a sample space in probability?

Back

A sample space is the set of all possible outcomes of a probability experiment.