Answered: Draw the distribution of points in the…

Draw the distribution of points in the x, y coordinate system 2. Make an equation of the line 3. Calculate the correlation coefficie

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

Questions 1. Draw the distribution of points in the x, y coordinate system 2. Make an equation of the line 3. Calculate the correlation coefficient

XII 3 5 7 10 12
7
5
10
12 13
MD
3 2 6 5 8 7
8
7
16
10
10 g
18 20
12 10

Definition Definition Statistical measure used to assess the strength and direction of relationships between two variables. Correlation coefficients range between -1 and 1. A coefficient value of 0 indicates that there is no relationship between the variables, whereas a -1 or 1 indicates that there is a perfect negative or positive correlation.

Expert Solution

Step 1: Write the given information.

Given information:

x	y
1	3
3	2
5	6
7	5
10	8
12	7
13	10
16	9
18	12
20	10

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question 9
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Consider the following table of data. 2 3 4 y 1 1 1 1.1 (a) Calculate the correlation coefficient. (b) Sketch a graph of the data. (c) Based on how closely the data fits a straight line, is your answer to part (a) surprising? Discuss the extent to which the correlation coefficient describes how well the data fit a horizontal line.
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question 6
Calculate the correlation coefficient r, letting Row 1 represent the x-values and Row 2 the y-values. Then calculate it again, letting Row 2 represent the x-values and Row 1 the y-values. What effect does switching the variables have on r? Row 1 14 25 36 45 59 66 80 Row 2 162 166 160 106 139 143 156 Calculate the correlation coefficient r, letting Row 1 represent the x-values and Row 2 the y-values. (Round to three decimal places as needed.)