3. The scatterplot given below measures the carats size of diamonds to the price of engagement rings for 30 recent ring sales. Let x represent the size in carats and y represent the price of the ring. 1100 1000 300 800 700 600 500 400 300 200 0.20 0.25 0.30 0.35 0.10 0.15 Size in Carats a. Which of the following could be the value of r? -0.309, 0.675, 0.996, -0.996, -0.675 b. Given that the regression line has a slope of 1230.5 and a y-intercept of 100.5, find the slope-intercept equation of the regression line. c. Use the regression line to predict the y-value for the x-value 0.20. Price

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
icon
Related questions
Topic Video
Question

3. The scatterplot given below measures the carats size of diamonds to the price of engagement rings for 30 recent ring sales. Show work

**Scatterplot Analysis of Diamond Carat Size and Price**

In this educational example, we analyze a scatterplot illustrating the relationship between the carat size of diamonds and the price of engagement rings. The data represents 30 recent ring sales, where:

- **x-axis**: Size in Carats
- **y-axis**: Price (in dollars)

The scatterplot shows a positive correlation, indicating that as the carat size increases, the price also tends to increase.

### Graph Explanation

- **X-axis (horizontal)**: Represents the size in carats, ranging approximately from 0.10 to 0.35.
- **Y-axis (vertical)**: Represents the price of the ring, ranging from $200 to $1000.
- **Data Points**: Each point indicates a specific sale, showing the relationship between carat size and price.

### Questions and Tasks

**a. Correlation Coefficient (r):**
Which of the following could be the value of r?
- Options: -0.309, 0.675, 0.996, -0.996, -0.675

**b. Regression Line Equation:**
Given the regression line has a slope of 1230.5 and a y-intercept of 100.5, formulate the slope-intercept equation of the regression line.

**c. Prediction Using Regression Line:**
Use the regression line to predict the y-value for the x-value 0.20 carats.

This analysis helps in understanding the linear relationship and making predictions about diamond pricing based on carat size.
Transcribed Image Text:**Scatterplot Analysis of Diamond Carat Size and Price** In this educational example, we analyze a scatterplot illustrating the relationship between the carat size of diamonds and the price of engagement rings. The data represents 30 recent ring sales, where: - **x-axis**: Size in Carats - **y-axis**: Price (in dollars) The scatterplot shows a positive correlation, indicating that as the carat size increases, the price also tends to increase. ### Graph Explanation - **X-axis (horizontal)**: Represents the size in carats, ranging approximately from 0.10 to 0.35. - **Y-axis (vertical)**: Represents the price of the ring, ranging from $200 to $1000. - **Data Points**: Each point indicates a specific sale, showing the relationship between carat size and price. ### Questions and Tasks **a. Correlation Coefficient (r):** Which of the following could be the value of r? - Options: -0.309, 0.675, 0.996, -0.996, -0.675 **b. Regression Line Equation:** Given the regression line has a slope of 1230.5 and a y-intercept of 100.5, formulate the slope-intercept equation of the regression line. **c. Prediction Using Regression Line:** Use the regression line to predict the y-value for the x-value 0.20 carats. This analysis helps in understanding the linear relationship and making predictions about diamond pricing based on carat size.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps with 2 images

Blurred answer
Knowledge Booster
Discrete Probability Distributions
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman