MAT S111 - STATS 2425

•A variable is any information, attribute, characteristic, number, or quantity that describes a person, place, event, thing, or idea that cannot be measured or counted.

• True
• False

•The probability can be greater than 1

• True
• False

•A variable can be qualitative or quantitative, wherein the latter can be either discrete or continuous.

• True
• False

•In a probability distribution for a discrete random variable, the sum of all the probabilities must be greater than one. 

• True
• False

•In a probability distribution for a discrete random variable, the sum of all the probabilities must be greater than one. 

• True
• False

•Suppose a manager mandates that all male employees must measure between 64 and 74 inches in height.

•The height of a person is a continuous variable.

• True
• False

•If the mean of a discrete random variable X is zero, then all the values of X must also be zero.

• True
• False

•The probability mass function (PMF) is used to describe the probability distribution of a continuous random variable.

• True
• False

•A random variable is a numerical outcome of a random experiment.

• True
• False

•A random variable can only take on discrete values.

• True
• False