SaiBook.us Statistics

Lesson

Title: Probability (coins)

Grade: 9-a Lesson: S3-L2

Explanation: Hello students, let us learn a new topic in statistics today with definitions, concepts, examples, and worksheets included.

Lesson:

Definition: Probability:

Probability in Statistics expresses the chance of an incident occurring. The value of probability ranges from zero to one.
It is used to predict the outcomes for the tossing of coins, rolling of dice, or drawing a card from a pack of playing cards.

$1$

Explanation:

Probability is classified into two types:

1.Theoretical probability: This is based on what is expected to happen in an experiment, without actually conducting it.

2.Experimental probability: It is based on the data which is obtained after an experiment is carried out.

Definition: Formula of probability:

The probability of an event can be calculated by probability formula by simply dividing the favorable number of outcomes by the total number of possible outcomes.
The value of the probability of an event or experiment to happen can lie between \$0 and 1\$ because the favorable number of outcomes can never cross the total number of outcomes.

$2$

Explanation:

Terms related to probability :

Experiment: An activity whose outcomes may be favourable or unfavourable but are not known is an experiment.

Trial: Various attempts in the process of experiment.

Event: A trial with well-defined outcome.

Outcome: It is the result of a event or experiment.