Informed Decisions Using Data (5th Edition)

The book is amazing, the people I bought from were not. When the used book arrived from Czars all the pages were coated in a dingy film. The book reeked of an odor I must assume was rat piss. Holding the book to read made me nauseous and ill. After teaching through chapter 1, I finally took it to a graphic arts place and had them photo copy all the pages so that I could throw it away.

Exactly what I needed for my statistics class. I didn't want to buy the newest book for my course so I bought this past edition. Turns out I didn't need the current addition. The book is in very good condition and came quickly.

This book is riddled with incorrect answers based on incorrect formulas. For example, a class midpoint is NOT found by taking the sum of consecutive lower class limits and dividing by 2. A class midpoint is obtained by taking the sum of a class's lower limit and upper limit and dividing by 2. To illustrate this, take two classes,15-19 and 20-24 and find the midpoint. Based on the formula in the book, the answers would be 17.5 and 22.5 respectively, however the correct answers are 17 and 22. If you want almost every mean (mu, x-bar) to be off by some small degree, then listen to the book, otherwise use resources elsewhere. On top of this, the book just doesn't explain concepts sufficiently, and it's easy to get confused and frustrated.

This book is riddled with incorrect answers based on incorrect formulas. For example, a class midpoint is NOT found by taking the sum of consecutive lower class limits and dividing by 2. A class midpoint is obtained by taking the sum of a class's lower limit and upper limit and dividing by 2. To illustrate this, take two classes,15-19 and 20-24 and find the midpoint. Based on the formula in the book, the answers would be 17.5 and 22.5 respectively, however the correct answers are 17 and 22. If you want almost every mean (mu, x-bar) to be off by some small degree, then listen to the book, otherwise use resources elsewhere. On top of this, the book just doesn't explain concepts sufficiently, and it's easy to get confused and frustrated.