Lesson 1: Illustrate Random Variable (Discrete & Continuous)

Lesson 1: Illustrate Random Variable (Discrete & Continuous)

Day 1

From the past activities, you have

1. Watched and participated the random experiment and learned what is random variable

2. learned the difference between Discrete and Continuous Variable

3. learned to denote random variable X

Now, do this short practice exercises

Multiple Choice

This is a trial, observation or a process whose outcome cannot be predicted. Additionally, we can repeat the same process numerous times under the same conditions.

• Social Experiment

• Random Variable

• Random Experiment

• Sample

Multiple Choice

The following is a random experiment except _____

• Tossing a die

• doing a survey on Filipino investors

• Drawing a card from a deck of cards

• Lotto Draw

Multiple Choice

A variable whose value is obtained by counting data is called__________

• Discrete

• Random Variable

• Continuous

• Sample

Multiple Choice

A variable whose value is obtained by measuring is called_____________

• Discrete

• Random Variable

• Continuous

• Sample

Multiple Choice

A variable that can be discrete or continuous is ______________________

• Discrete

• Random Variable

• Continuous

• Sample

Multiple Choice

Time it takes to get to school is an example of ________________________

• Discrete

• Random Variable

• Continuous

• Sample

Multiple Choice

Number of heads in flipping coins is an example of ___________________

• Discrete

• Random Variable

• Continuous

• Sample

Now, read some summary concepts about random variable.

What is a random variable?

A Random Variable is a capacity that connects a real number with every component in the sample space. It is a variable whose qualities are controlled by chance. In this manner, a Random Variable is a numerical amount that is derived from the results of an arbitrary trial or experiment.

Open Ended

YOUR TURN:

Give a random variable with the experiment:

Tossing two fair coins simultaneously.

What is a Discrete random variable?

Discrete Random Variables are variables that can take on a finite number of distinct values. They are variables that can be counted.

What is a Continuous random variable?

Continuous Random Variables are random variables that take an interminably uncountable number of potential values, regularly measurable amounts.

YOUR TURN

DISCRETE VS.CONTINUOUS VARIABLE

Multiple Select

The temperature of a solution in the laboratory

• DISCRETE

• CONTINUOUS

Multiple Select

Collecting data about the heights of students in a public school

• DISCRETE

• CONTINUOUS

Multiple Select

Number of promoted students at the end of school year

• DISCRETE

• CONTINUOUS

Multiple Select

Recording the distance travelled by the bus

• DISCRETE

• CONTINUOUS

Multiple Select

Surveying about the number of cases due to Covid - 19 pandemic in Quezon Province

• DISCRETE

• CONTINUOUS

Multiple Choice

Which of the following variable is discrete random variable?

• A. The amount of unleaded gasoline in a Suzuki car

• B. The temperature of a cup of coffee served at a coffee shop.

• C. The number of boys in a randomly selected two-child family

• D. The average amount spent on electric bill every month of May by a randomly selected household in Quezon Province.

Multiple Choice

You decided to conduct a survey of families with three children. You are interested in counting the number of girl in each family. Is this a random variable?

• Maybe

• Cannot be determined

• Yes, it is a random variable.

• No, it is not a random variable.

You did it!

See you on Moday at

8:00 A.M. - 9:30 A.M.