2nd NW Test Review

Front

What is a sample in statistics?

Back

A sample is a subset of a population used to represent the entire group in statistical analysis.

Front

How do you calculate the proportion of a specific outcome in a sample?

Back

Proportion = (Number of specific outcomes) / (Total number of outcomes in the sample).

Front

What is the probability of an event?

Back

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

Front

How do you find the probability of two independent events occurring together?

Back

Multiply the probabilities of each event: P(A and B) = P(A) * P(B).

Front

What does it mean for two figures to be similar?

Back

Two figures are similar if they have the same shape but may differ in size, with corresponding angles equal and corresponding sides in proportion.

Front

What is a fair coin?

Back

A fair coin is one that has an equal chance of landing on heads or tails, with a probability of 1/2 for each side.

Front

How do you predict outcomes based on a survey?

Back

Use the results from the sample to estimate the total population's preferences, often by scaling up the sample results.

Front

What is a spinner in probability?

Back

A spinner is a tool used in probability experiments, divided into sections, where each section represents a possible outcome.

Front

How do you determine the expected number of outcomes in a probability experiment?

Back

Expected number = (Total trials) * (Probability of the outcome).

Front

What is a random sample?

Back

A random sample is a subset of individuals chosen from a larger set, where each individual has an equal chance of being selected.