Statistics and Probability

If a pair of dice is rolled, which is not a possible value of the random variable for the sum of the points on the upturned faces of the dice

• 1

• 4

• 7

• 11

The following are continuous random variable except

• weight of persons

• height of a person

• income/money

• number of heads in 3 tosses of a fair coin

A function whose value is a real number determined by each element in the sample space - set of all possible outcomes of an experiment.

• random variable

• probability distribution

• density function

• histogram

What makes the distribution below a probability distribution?

• The random variable is equally distributed

• The sum of all values of P(x) is equal to one

• The values of a probability distribution are probabilities

• the values of the P(x) are the numbers on the interval form 0 to 1

1.The sum of all the values of a probability distribution must be equal to 0. 

• True 

• False

It can assume an infinite number of values in an interval between two specific values which are often results of measurement

• Coninuous Random Variable

• Discrete Random Variable

• Discrete Probability Distribution

• Random Variable

Which of the following is NOT a true statemnet?

• The value of a random variable could be zero

• Random Variables can only have one value

• The probability of the value of a random variable could be zero

• The sum of all the probabilities in a probability distribution is always equal to 1

The following are ways to represent discrete probability distribution except

• tabular

• equation

• graphical

• box plot

A variable being measured to produce numerical observations associated with random outcomes of a chance experiment are called _______.

• Date

• Populations

• Sample space

• Statistics

Which of the following is a discrete random variable?

• the average amount of electricity consumed

• the number of persons eating seafood in a restaurant

• the percentage of the students who passed the exam

• the average weight of female athletes