Corinthians-Statistics and Probability Quiz

Which of the following is a discrete random variable?

• package received last week was 4 kilos

• can of young corn which weighs 1.45 kg

• maximum temperature in Leyte was 32.20 C

• car Corp. reported, sold 458 cars in the past 8 months

If three coins are tossed, which is NOT a possible value of the random variable for the number of heads?

• 1

• 2

• 3

• 4

Which of the following statements is true?

• Random variables can only have one value.

• The value of a random variable could not be zero.

• The probability of the value of a random variable could not be zero.

• The sum of all the probabilities in a probability distribution is always equal to one.

If P(X) = X / 4, what are the possible values of x for it to be a probability distribution?

• 0,2,3

• 1,2,3

• 2,3,4

• 1,1,2

The following random variables are examples of continuous, EXCEPT the_______

• speed of the car

• time needed to finish the test

• amount of sugar in a cup of coffee

• number of siblings in a family of a region

A function that associates a real number to each element in the sample space is called ____.

• continuous

• discrete

• random variable

• constant and variable

Suppose three coins are tossed. How many possible outcomes?

• 2

• 4

• 6

• 8

The sum of the probabilities of all values of the random variable must be equal to____.

• 1

• 0

• -1

• -2

The set of all possible outcomes of an experiment is called the_______.

• domain

• function

• range

• sample space

How many possible outcomes in the table?

• 2

• 4

• 6

• 8