Assessment Part 1

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

• variable

• exponential function

• quadratic function

• random 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 the range of a random variable?

• some set of real numbers

• sample space

• set of whole 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 elements are there in the domain?

A human resource manager is researching about the trend of employee hiring on several startup companies who are looking to expand operations. The table below shows the projected number of employees to be added.

What is the random variable involved in the study?

• startup companies

• target hires

• employee hiring

• Samuk Inc.

An experiment involves tossing five coins. How many elements are there in the domain?

What is the domain 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, 9, 10}

• {2, 4, 6, 8, 10, 12}

• {3, 6, 9, 12, 15, 18}

• {1, 2, 3, 4, 5, 6}

Suppose that you toss three fair coins. You get a score of for each coin that shows tails and for each coin that shows heads. Let X be your total score. What values can the random variable X take?

• -3

• 3

• -1

• 1

• 2