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Basic Probability

Section 7-2

Name:

This is a chance process or situation that leads to well-

1.

Define PROBABILITY EXPERIMENT:

defined results called outcomes.

An outcome is the result of a single trial of a probability experiment.

2.

Define OUTCOME:

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

3.

Define SAMPLE SPACE:

An event consists of a set of outcomes of a probability experiment.

4.

Define EVENT:

5.

What is the difference between Empirical Probability, Theoretical (Classical) Probability, and Subjective Probability?

Empirical probability is the ratio of the number of successful trials divided by the total

number of trials. Theoretical probability is the number of successful possible outcomes

divided by the number of total possible outcomes (assuming each outcome is equally likely),

Subjective probability is a professional’s estimate of the chance of an outcome occurring.

The law of large numbers suggests that as more

6.

What does the LAW of LARGE NUMBERS suggest?

and more trials of a probability experiment are attempted the closer the more likely the

empirical probability will match the theoretical probability.

Determine whether each of the following are EMPIRICAL ,THEORETRICAL ,or SUBJECTIVE probability & determine the probability.

1.

What is the probability of rolling a standard six sided number cube to a number with 4 letters in the spelling of that number?

Circle one of the following:

Decimal:

Percent:

Fraction:

Theoretical

Empirical

Subjective

2.

Janice attempted to shoot 34 free throws with a basketball. She made 19 of the free throws. Based on those results what would you

estimate the probability to be that she makes the next free throw?

Circle one of the following:

Decimal:

Percent:

Fraction:

Theoretical

Empirical

Subjective

3.

A weather forecaster suggests that there is a 40% chance of snow and ice on the next day.

Circle one of the following:

Decimal:

Percent:

Fraction:

Theoretical

Empirical

Subjective

4.

A person has 5 coins in their pocket. A dime, 2 pennies, a quarter, and a nickel. If a person randomly picks one coin out of their pocket.

What would the probability be that they get a penny?

Circle one of the following:

Decimal:

Percent:

Fraction:

Theoretical

Empirical

Subjective

The complement of an event is everything in the sample space

5.

Define Complement of an event:

except the original event.

Drawing a lettered card.

6.

What is the Complement of drawing a “numbered” card from a standard deck of shuffled cards?

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Parent category: Education