RANDOM VARIABLES

It is a variable whose value is determined by the outcome of a random procedure.

• Random Variable

• Discrete

• Continuous

It is repeatedly done under similar condition.

• Sample Space

• Experiment

• Outcome

It is the result of the trial in an experiment.

• Sample Space

• Outcome

• Experiment

It is a random variable where the observed numerical value are the results of measuring and may take on any numbers contained within any numerical intervals.

• Continuous

• Discrete

• Probability

It is a random variable where the observed numerical value is produced by counting and assumes whole numbers only.

• Continuous

• Probability

• Discrete

List the sample space for this experiment : Tossing fair coin three times into the air.

• S = { TT , HH, TH, HT}

• S = { T , H }

• S = {HHH, HHT, HTH, HTT, THH, THT, TTH, TTT}

List the sample space for this experiment : A coin is tossed at the start of a basketball match.

• S = { TT , HH, TH, HT}

• S = { T , H }

• S = {HHH, HHT, HTH, HTT, THH, THT, TTH, TTT}

Which of the following represents a discrete random variable?

• The weight in kilograms of randomly selected Senior High School students.

• The time it takes a student to finish answering the midterm exams.

• The number of patients who experience side effects after taking antibiotics.

Which of the following random variables is continuous

• The number of defective cellular phones in a box of 20.

• The time required to finish a certain job.

• The number of correct answers in 20-item multiple choice test.

Discrete or Continuous? : The amount of rainfall in Manila City in a year.

• Discrete

• Continuous