Identify the reasons the following statements are incorrect. Not all reasons will be used. Researchers found that the correlation between the number of pages in novels and the number of hours it takes to read them is r = 0.71 pages. The correlation between the advertised selling price of cars and the makes of the cars is r = -0.69. The amount of ice cream in a sundae and the total grams of fat are highly correlated (r= 1.15). The correlation between average gas mileage in miles per gallon and average highway speeds in miles per hour differs from the correlation between average gas mileage in miles per gallon and average highway speeds in kilometers per hour.

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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**Identify the reasons the following statements are incorrect. Not all reasons will be used.**

1. **Researchers found that the correlation between the number of pages in novels and the number of hours it takes to read them is \( r = 0.71 \) pages.**

   - **Answer Reason:** Correlation should not depend on units.

2. **The correlation between the advertised selling price of cars and the makes of the cars is \( r = -0.69 \).**

   - **Answer Reason:** Both variables should be numerical.

3. **The amount of ice cream in a sundae and the total grams of fat are highly correlated (\( r = 1.15 \)).**

   - **Answer Reason:** Correlation should be between \(-1\) and \(1\).

4. **The correlation between average gas mileage in miles per gallon and average highway speeds in miles per hour differs from the correlation between average gas mileage in miles per gallon and average highway speeds in kilometers per hour.**

   - **Answer Reason:** Correlation should not depend on units.

**Answer Bank:**

- Correlation should be greater than 0.
- Correlation should depend on units.
- One of the variables should be categorical.
- Both variables should be numerical.
- Correlation should be between \(-1\) and \(1\).
- Correlation should not depend on units.
Transcribed Image Text:**Identify the reasons the following statements are incorrect. Not all reasons will be used.** 1. **Researchers found that the correlation between the number of pages in novels and the number of hours it takes to read them is \( r = 0.71 \) pages.** - **Answer Reason:** Correlation should not depend on units. 2. **The correlation between the advertised selling price of cars and the makes of the cars is \( r = -0.69 \).** - **Answer Reason:** Both variables should be numerical. 3. **The amount of ice cream in a sundae and the total grams of fat are highly correlated (\( r = 1.15 \)).** - **Answer Reason:** Correlation should be between \(-1\) and \(1\). 4. **The correlation between average gas mileage in miles per gallon and average highway speeds in miles per hour differs from the correlation between average gas mileage in miles per gallon and average highway speeds in kilometers per hour.** - **Answer Reason:** Correlation should not depend on units. **Answer Bank:** - Correlation should be greater than 0. - Correlation should depend on units. - One of the variables should be categorical. - Both variables should be numerical. - Correlation should be between \(-1\) and \(1\). - Correlation should not depend on units.
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