Author(s): Frederick J Gravetter, Larry B. Wallnau, Lori-Ann B. ForzanoDifference between 9th and 8th editions Side by side comparison of table of contents helps to figure out the most significant changes. |

**Key differences between 9th and 8th editions**

- Period between current and previous editions: 4 years (2017 vs 2013).
- Gravetter & Wallnau
*Essentials of Statistics*was first published in 1999. - Many chapters in the The Ninth edition have been shortened and simplified.
- All sections in the text begin with a list of Learning Objectives and end with a Learning Check questions.
- Ninth Edition provides updated research examples, fresh real-world examples, and extensively revised end-of-chapter problems.
- Chapter 4 has separate section on proof of unbiasedness of sample variance.
- Chapter 5 includes new section in on other relationships between z-Scores, X, the mean, and standard deviation.
- New section in Chapter 11 compares repeated-measures design vs independent-measures design.
- Chapter 13 explains repeated-measures and two-factor analysis of variance in more details.

Essentials of Statistics for The Behavioral Sciences

Published by: Cengage Learning, January 01, 2017

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Available |

Published by: Wadsworth Publishing, January 01, 2017

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$121.00 |
From: $61.92 |

Essentials of Statistics for the Behavioral Sciences

Published by: Wadsworth Publishing, February 01, 2013

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Available |

Published by: Cengage Learning, January 01, 2013

Book Store | New | Used | Rent |
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From: $63.00 |

International Edition

**Paperback**, 656 pages

Published by: Wadsworth Publishing Co Inc, January 31, 2013

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From: $11.13 |

Essentials of Statistics for Behavioral Science

Cengage Advantage Books

**Loose Leaf**, 656 pages

Published by: Cengage Learning, January 01, 2010

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$4,382.58 |
From: $50.00 |

Published by: Cengage Learning, January 01, 2010

Book Store | New | Used | Rent |
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$57.64 |
From: $3.01 |

**Saving advice**

- The new 9th edition costs
**$59.08**more then used book.