Unit Test. Random Variable

It is a function that associates a numerical value with every outcome of an experiment.

• random variable

• quadratic function

• exponential function

• variable

Which of the following is the domain of a random variable?

• sample space

• set of whole numbers

• set of real numbers

• subset of the outcomes of the experiment

Which of the following is not a random variable?

• The amount of water a student drinks every day

• The time it takes for each student to finish an exam

• The number of babies born in the Philippines in 2015

• The number of teachers in each school in the Philippines

An experiment involves tossing three fair coins. How many possible outcome?

• 8

• 16

• 32

• 48

An experiment involves tossing five coins. How many possible outcomes?

• 8

• 16

• 32

• 48

What is the possible outcome (sample space) when two coins are tossed?

• S = {H, T}

• S = {HH, TT}

• S = {HH, HT, TH}

• S = {HH, HT, TH, TT}

Two dice are rolled. If X is the sum of the identical numbers on the two dice, then what is the range of X?

• {2, 4, 6, 8, 10, 12}

• {2, 4, 6, 8, 9, 10}

• {3, 6, 9, 12, 15, 18}

• {1, 2, 3, 4, 5, 6}

Which of the following is an example of a discrete random variable?

• number of scholars in each class

• air temperature in each room

• amount of time spent studying

• weight of each plane baggage

Which of the following is an example of a continuous random variable?

• speed of a car

• population in certain barangay

• basketball scores

• number of computer units sold

Which of the following can be a representation of the values of a discrete random variable?

• [5, 10]

• {1, 2, 3, 4, ...}

• (5,10)

• {6}