Chapter 3 Review

What is the probability of an event that is impossible?

• 1

• 0

• 0<p<1

• 100%

What is the probability of an event that is certain to happen?

• 1

• 0

• 0<p<1

• 100%

How many defects are in the category "scratch"?

• 5870

• 1312

• 5872

• 1495

Find the probability that a randomly selected pair of defective lenses will be in the category "scratch".

• .464

• .456

• .461

• .465

The law of large numbers suggests which of the following?

•     Theoretical probability will be closer to empirical when the data set is small.

• Empirical probability is not as useful as theoretical probability unless the data set is very small.

• The more data we have, the closer the empirical probability will be to the theoretical probability.

• The less data we have, the less reliable the theoretical probability will be.

In a large school, it was found that 78% of students are taking a math class, 71% of student are taking an English class, and 52% of students are taking both.Find the probability that a randomly selected student is taking a math class or an English class. You may answer with a fraction or a decimal rounded to three places if necessary.

• .26

• .97

• .19

• .07

What is the probability that a person selected at random is both a student and against increasing the fees?

• .556

• .698

• .200

• .441

What does Mutually Exclusive Events mean?

• The probability of the intersection is 100%

• The probability of both events happening is 100%

• The probability of the events happening at the same time is 0%

• The probability of the intersection is 0%

In a large school, it was found that 74% of students are taking a math class, 80% of student are taking an English class, and 63% of students are taking both.Find the probability that a randomly selected student is taking a math class or an English class. You may answer with a fraction or a decimal rounded to three places if necessary.

• .91

• .469

• .182

• .698

What is the probability that a person selected at random is either administration or against increasing the fees?

• .688

• .699

• .689

• .698