Contingency Tables

One hundred and thirty-two individuals were selected at random and asked which brand of car they preferred.  They were then sorted by age. 

What is the probability that a person, selected at random, is in the 18-34 age group? Write your answer as a fraction or a decimal rounded to three significant digits.

What is the probability that a person, selected at random, prefers Honda or Toyota but not Nissan? Write your answer as a fraction or a decimal rounded to three significant digits.

The table shows a sample of 378 students sorted by whether they are in a club and what language they study in school.

What is the probability that a student does not take Latin?

James is interested in the relationship between weather conditions and whether his train runs on time. For a year, James records whether each day is sunny, cloudy, rainy, or

snowy, as well as whether this train arrives on time or is delayed.

What is the probability that it will rain AND his train is delayed?

• 55/365

• 15/55

• 15/365

• 15/35

James is interested in the relationship between weather conditions and whether his train runs on time. For a year, James records whether each day is sunny, cloudy, rainy, or snowy, as well as whether this train arrives on time or is delayed. What is the probability that it will rain GIVEN his train is delayed?

• 55/365

• 15/55

• 15/365

• 15/35

One hundred and thirty-two individuals were selected at random and asked which brand of car they preferred.  They were then sorted by age. What is the probability that a person, selected at random, preferred Honda? Write your answer as a fraction or a decimal rounded to three significant digits.

Find P(Spring or Female)

• 0.667

• 0.156

• 0.578

• 0.090

Find P(Winter | Male)

• 0.316

• 0.429

• 0.135

• 0.133

Find P(Female | Summer)

• 0.462

• 0.231

• 0.133

• 0.733

Find P(Female | not Fall)

• 0.5

• 0.231

• 0.133

• 0.733