Midterm Exam Practice Questions

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

How do you calculate the probability of an event occurring?

Back

P(B) = Number of favorable outcomes / Total number of outcomes.

Front

What does a correlation coefficient (r) indicate?

Back

The correlation coefficient (r) indicates the strength and direction of a linear relationship between two variables.

Front

What is the range of values for the correlation coefficient?

Back

The correlation coefficient (r) ranges from -1 to 1.

Front

What is cluster sampling?

Back

Cluster sampling is a sampling technique where the population is divided into clusters, and a random sample of these clusters is selected.

Front

What is the difference between simple random sampling and cluster sampling?

Back

In simple random sampling, every individual has an equal chance of being selected, while in cluster sampling, entire clusters are randomly selected.

Front

What is conditional probability?

Back

Conditional probability is the probability of an event occurring given that another event has already occurred, denoted as P(A|B).

Front

How can you check for independence of two events A and B?

Back

Events A and B are independent if P(A|B) = P(A).

Front

What is a sample space in probability?

Back

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

Front

What is the sample space for having children until one boy and one girl is born?

Back

S = {GB, BG, BBG, GGB, BBB, GGG}.