Probability Concepts Review for 7th Grade STAAR

What does the term 'probability' refer to?

• The likelihood of an event occurring

• The likelihood of an event not occurring

• The number of possible outcomes for an event

• The certainty of an event occurring

What is the complement in probability?

• The number of ways an event can occur

• The total number of outcomes

• The likelihood of an event occurring

• The probability of the event not occurring

How can one represent a sample space?

• Using a formula

• Creating a list, table, or tree diagram

• Calculating the total number of trials

• By determining the theoretical probability

What defines experimental probability?

• Based on theoretical outcomes

• Ratio of successful outcomes to total trials based on actual data

• Outcome of independent events

• Probability based on the complement

What is theoretical probability based on?

• Actual experiments conducted

• Independent events only

• All possible outcomes

• Data from previous experiments

What happens to experimental probability as the number of trials increases?

• It decreases

• It remains constant

• It approaches theoretical probability

• It becomes less reliable

What is an example of independent events?

• Selecting a card and not replacing it

• Flipping a coin twice without observing the first outcome

• Rolling a dice and spinning a spinner

• Drawing two names from a hat without replacement

What is the probability of drawing an ace and then a queen without replacement?

• 1/2

• 1/6

• 1/15

• 1/12

What characterizes dependent events?

• The outcome of one does not affect the other

• Events that are not based on probability

• The outcome of one event affects the outcome of another

• Events that have no possible outcomes

If a spade is replaced and then a two is drawn, what is the probability of this sequence?

• 1/12

• 1/15

• 1/6

• 1/2