Ch 16 CPD's

Which one of the following is a discrete probability distribution?

• 
• 
• 
• 

• 2.6

• 2.9

• 3.7

• 4.1

• 2.16

• 2.71

• 3.25

• 3.84

Catherine conducted a survey to investigate the number of pets in a household and produced the given graph.

What fraction of the households have fewer than two pets?

Catherine conducted a survey to investigate the number of pets in a household and produced the given graph.

If a household is randomly chosen, what is the expected number of pets they will have?

• 0 

• 1

• 2

• 3

Which one of the following is not a property of a probability density function?

• It is a continuous random variable

Which one of the following satisfies the conditions of a probability density function?

Which one of the following expected value or variance formulae is incorrect?

• 0.0401

• 0.7881

• 0.9554

• 0.9641

• 0.5000

• 0.6554

• 0.6915

• 0.9772