Slide 4- 1Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

Active Learning Lecture Slides For use with Classroom Response Systems

Elementary Statistics Eleventh Edition

and the Triola Statistics Series

by Mario F. Triola

Chapter 4: Probability

Slide 4- 2Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

Express the indicated degree of likelihood as a probability value:

“There is a 40% chance of rain tomorrow.”

A. 40

B. 0.60

C. 0.40

D. 4

Slide 4- 3Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

Express the indicated degree of likelihood as a probability value:

“There is a 40% chance of rain tomorrow.”

A. 40

B. 0.60

C. 0.40

D. 4

Slide 4- 4Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

A bag contains 6 red marbles, 3 blue marbles, and 7 green marbles. If a marble is randomly selected from the bag, what is the probability that it is blue?

A. 1/3

B. 1/7

C. 3/16

D. 1/13

Slide 4- 5Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

A bag contains 6 red marbles, 3 blue marbles, and 7 green marbles. If a marble is randomly selected from the bag, what is the probability that it is blue?

A. 1/3

B. 1/7

C. 3/16

D. 1/13

Slide 4- 6Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

Assume that one student in a class of 27 students is randomly selected to win a prize. Would it be “unusual” for you to win? (Assume “unusual” is a probability less than or equal to 0.05)

A. Yes

B. No

Slide 4- 7Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

Assume that one student in a class of 27 students is randomly selected to win a prize. Would it be “unusual” for you to win? (Assume “unusual” is a probability less than or equal to 0.05)

A. Yes

B. No

Slide 4- 8Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

A bag contains 8 red marbles, 4 blue marbles, and 1 green marble. Find P(not blue).

A. 9/13

B. 9

C. 13/9

D. 4/13

Slide 4- 9Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

A bag contains 8 red marbles, 4 blue marbles, and 1 green marble. Find P(not blue).

A. 9/13

B. 9

C. 13/9

D. 4/13

Slide 4- 10Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

If A and B are dependent events, then P(A and B) is

A. P(A) • P(B|A)

B. P(A) • P(B)

C. P(A) • P(A|B)

Slide 4- 11Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

If A and B are dependent events, then P(A and B) is

A. P(A) • P(B|A)

B. P(A) • P(B)

C. P(A) • P(A|B)

Slide 4- 12Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

The following table contains data from a study of two airlines which fly to Small Town, USA.

Number of on time flights

Number of late flights

Podunk Airlines 33 6

Upstate Airlines 43 5

One of the 87 flights is randomly selected. Find the probability that the flight selected arrived on time given that it was an Upstate Airlines flight.

A. 43/87

B. 11/76

C. 43/48

D. None of the above is correct.

Slide 4- 13Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

The following table contains data from a study of two airlines which fly to Small Town, USA.

Number of on time flights

Number of late flights

Podunk Airlines 33 6

Upstate Airlines 43 5

One of the 87 flights is randomly selected. Find the probability that the flight selected arrived on time given that it was an Upstate Airlines flight.

A. 43/87

B. 11/76

C. 43/48

D. None of the above is correct.

Slide 4- 14Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

Find 10C2

A. 80,640

B. 40,320

C. 45

D. 5

Slide 4- 15Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.

Find 10C2

A. 80,640

B. 40,320

C. 45

D. 5