Statistics and Probability Output Test- Random Variable

Which of the following statements is true?

• A random variable is a quantity having a numerical value for each member of a group, especially one whose values occur according to a frequency distribution.

• A random variable is a quantity having a value for each member of a group, especially one whose values occur according to a frequency distribution.

• A random variable is a quality having a numerical value for each member of a group, especially one whose values occur according to a frequency distribution.

State whether the variable is discrete or continuous. Use CAPITAL letters in typing your answer. The speed of a solar car.

State whether the variable is discrete or continuous. Use CAPITAL letters in typing your answer. The number of plates of pizza served by a restaurant each day.

A random variable is defined by a rule that assigns a _______________ to every outcome in a sample space.

• number

• letter

• Event

• probability

A fair coin is flipped three times. What is the probability of seeing heads exactly once?

• 3/8

• 1/8

• 1/2

• 1/6

Which of the following is a discrete random variable?

• The average amount of electricity consumed

• The number of patients in a hospital

• The amount of paint used in repainting a building

• The average weight of female athletes

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

• 0

• 1

• 2

• 3

What is the sample space suppose two coins are tossed?

• {HH,HT,TH,TT}

• {H,T}

• {HH,TT}

• {HHH,TTT, HHT, HTH, HTT, THH, THT,TTH}

It takes the set of possible values from a random experiment

• Statistics

• Data

• Random Variable

• Sample Space

Identify whether the experiment involves a discrete or a continuous random variable.

Rotating a spinner that has 4 equally divided parts: blue, green, yellow, and red

• Discrete Random Variable

• Continuous Random Variable