Flashcard (Probability Rules & Likelihood)

Front

What does an 80% chance of rain indicate?

Back

Likely

Front

What is probability?

Back

A number that describes the likelihood that an event will occur.

Front

If a jar contains 4 blue marbles, 6 green marbles, and 10 white marbles, what is the probability of drawing a green marble?

Back

30%.

Front

Is -0.41 a valid probability?

Back

False.

Front

What does a 25% probability indicate about an event?

Back

Unlikely.

Front

What is the range of valid probability values?

Back

0 to 1 (or 0% to 100%).

Front

What does a probability of 1 mean?

Back

The event is certain to occur.

Front

What does a probability of 0 mean?

Back

The event is impossible.

Front

How do you calculate the probability of an event?

Back

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

Front

If an event has a probability of 0.5, how likely is it to occur?

Back

It is equally likely to occur or not occur.