6. The following sample contains the scores of 6 students selected at random inMathematics and English. Use the scores in English as the dependent variable Y.Mathematicsscore (X)English score(Y)7074928074 65 8384 63 87 78 90Σ æ=464, Σy=476, Σ w2 -36354, Σy-X-38254, Σæy=36926.c) Find the sample correlation coefficient r and interpret. O- 0.2397 and the relationship between x and y is weak0.2397 and the relationship between x and y is strongO-0.2397 and the relationship between x and y is strong0.2397 and the relationship between x and y is weak

Answered: 6. The following sample contains the…

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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Find the correlation coefficient between x and y values given below. 2 3 5 6 12 y 20 12 10 8 7 3 Select one: a. 0.920 b. 0.898 C.-0.898 d. -0.920 е. -0.296
d) Correlation by eye Sample size=45 y 20- 15- og 8. 10- 5. 10 15 20 25 X Try to guess the sample correlation within +/- 0.1 Guess: Correlation: Sample coeficient of correlation a o 00 00
The following show the respective ages in years and the corresponding weighs in lbs of 8 women. What is the coefficient of Correlation? Age (x) Weight (y) 42 120 38 135 45 140 27 115 16 98 25 123 37 130 38 132 Select one: a. 0.847 b. 0.478 c. .748 d. .447
Q-1. You are given the following data for variables x and y: X Y 3.0 1.5 2.0 0.5 2.5 1.0 3.0 1.8 2.5 1.2 4.0 2.2 1.5 0.4 1.0 0.3 2.0 1.3 2.5 1.0 b. Compute the correlation coefficient for these sample data. Indicate what the correlation coefficient measures.
Which of the following choices could be the Pearson correlation between the x and y variables shown in the scatter plot shown here? a) .934 b) -.934 c) 1 d) 0
The correlation between midterm and final grades for 300 students is 0.620. If 5 points are added to each midterm grade, the new r will be: a. 0.124 b. 0.57 c. 0.62 d. 0.744
The following table shows the weekly sales, test scores & achievement ratings of 5 salespersons working for a local car dealership: Salesperson Weekly Sales (Y) Sales Aptitude Test Score (x1) Mechanical Achievement (x2) Walters 11 10 6 Sullivan 5 4 2 Obmer 8 1 4 Smith 12 7 5 Jones 4 3 1 Brown 6 5 3 Black 7 2 2 Calculate the multiple correlation coefficient.. Select one: a. 0.925 b. 0.952 c. 0.295 d. 0.592
*8. Calculate the coefficient of correlation between X and Y from the following data and calculate probable error. Assume 69 and 112 as the mean value for X and Y respectively. X : 78 89 99 60 59 79 68 61 Y : 125 137 156 112 107 136 123 108
4. Consider the following data: XINMASSN 1 2 3 4 5 6 7 y 6 7 5 4 3 1 2 a) Make a scatterplot of these data. The variable labeled "x" should be plotted along the x-axis. Describe the pattern. b) Find the correlation coefficient for these data.
2.) The table shown below are the raw scores obtained by eight (8) students. Is there a relationship in their scores in Mathematics and in Biology? Use Pearson Product-Moment Coefficient of Correlation to establish the relationship. Student 1 3 4 6. 8. Mathematics (x) 6. 3. 4 3 Biology (y) 8. 3. 7 4
Here are data for height and weight among 10 male college students.Height (cm) Weight (kg)159 48162 50161 52175 60174 64198 81172 58180 74161 50173 54A. Calculate the correlation coefficient for height and weight forthis group.B. Is the correlation coefficient statistically significant? Explain.
Suppose we have the following paired observations of variables X and Y: X Y 8 0 4 10 12 20 Draw the scatter plot comparing X and Y. Calculate the values of the sample covariance and sample correlation between X and Y. Using this information, how would you characterize the relationship between X and Y ?

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