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The Practice of Statistics | 5th Edition | ISBN: 9781464108730 | Authors: Daren S. Starnes, Josh Tabor
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Oatmeal and cholesterol Does eating oatmeal reduce cholesterol? An advertisement

Chapter 1, Problem 18

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QUESTION:

Oatmeal and cholesterol Does eating oatmeal reduce cholesterol? An advertisement included the following graph as evidence that the answer is Yes. 210 208 206 204 202 200 198 196 Cholesterol Week 1 Week 2 Week 3 Week 4 Representative cholesterol point drop (a) How is this graph misleading? (b) Make a new graph that isnt misleading. What do you conclude about the relationship between eating oatmeal and cholesterol reduction?

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QUESTION:

Oatmeal and cholesterol Does eating oatmeal reduce cholesterol? An advertisement included the following graph as evidence that the answer is Yes. 210 208 206 204 202 200 198 196 Cholesterol Week 1 Week 2 Week 3 Week 4 Representative cholesterol point drop (a) How is this graph misleading? (b) Make a new graph that isnt misleading. What do you conclude about the relationship between eating oatmeal and cholesterol reduction?

ANSWER:

Step 1 of 3

(a)

The bars of the bar graph should start at 0 instead of at 196  this causes the differences between the weeks to be exaggerated.

 

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