Prob Stat Chapter 5 Practice

The set of all possible outcomes of an experiment.

• Probability

• Sample Space

• Combination

• Permutation

A variable that can take on a finite number of distinct values.

• Random

• Independent

• Discrete

• Dependent

A list of the possible values of random variable and the corresponding probabilities of the values.

• Outcomes

• Probability Distribution

• Experiment

• Continuous Random Variable

What is the sum of all probabilities of all values of the random variable?

• -1

• 0

• 1

• 2

A marketing survey compiled data on the number of cars in households. If X = the number of cars in a randomly selected household, and we omit the rare cases of more than 5 cars, then X has the probability distribution shown. What is the probability that a randomly chosen household has at least two cars?

• 0.20

• 0.29

• 0.39

• 0.61

Is the following a probability distribution?

• Yes, because all of the probabilities are between 0 and 1 inclusive and the sum of all the probabilities is 1.

• No, all probabilities are not be between 0 and 1 inclusive

• No, the sum of all the probabilities is not 1.

• Yes, because the distribution is symmetric

The following table represents the probability distribution X, the employment status of adults in a city.

What is the probability that the adults isn't retired?

Find the possible values of random variable T which represents the number of tails occur in tossing 4 coins.

• 1,2,3,4

• 0,1,2,3,4

• 0,1,2,3

• 2,3,4,5

A variable that take an uncountable number of potential values, regularly measurable amounts.

• Continuous

• Discrete

• Independent

• Dependent

Which of the following is an example of discrete random variable?

• The heights of the students

• The distance traveled by a car

• The number of face mask sold in a pharmacy

• The speed of a bike during the race