State with reasons whether the following statements are true or false.1. Coefficient of correlation between two variables X and Y is r = 0.6. Hence the coefficient of1Y is r 0.3.2correlation between variables X and2. Coefficient of correlation between two variable x and y is r1. Hence the coefficient of1correlation between variables x +2and y +is r = 1.3. Coefficient of correlation between two variables X and Y is zero. Hence X and Y are unrelatedvariables.4. Coefficient of Correlation between two variables Xand Y is 0.8. Hence the coefficient of correlationbetween X and -Y is -0.8.5. Given that the correlation between x and y is 0.5. The correlation between (2x-4) and (3-2y) is -0.5.6. Karl Pearson's Correlation Coefficient always lies between 0 and 1.

Answered: Image /qna-images/answer/1adf5325-aec4-4ddf-b5c2-8becc3b85d37.jpg

Answered: State with reasons whether 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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19. Which statement is correct? (A) The correlation coefficient and the intercept of the regression line always have the same sign. (B) The slope and the intercept of the regression line always have the same sign. (C) The correlation coefficient and the intercept of the regression line always have the same sign. (D) The correlation coefficient and the slope of the regression line always have the same sign. If you feel the answer is none of the choices given, submit no answer to the question.
16)
Variable A and Variable B are very highly correlated at r = -.89. Joe’s z-score on Variable A is -1.5. Which of the following would be the best guess for his z score on Variable B? a. 0 b. -1.335 c. 1.5 d. -1.5 e. -0.90
The following statement contains an error. Choose the statement that best explains the error. "The correlation between shoe size and height is 0.87 inches" A. Correlation requires that both of the variables be categorical B. When stating the correlation coefficient, one must state whether it is a positive or negative relationship C. This statement does not tell us whether or not shoe size is correlated with height D. When reporting correlation, one does not report units because correlation has no units E. There is no error in this statement
9. Tell whether the correlation coefficient would be closest to -1, 0 or 1. a. b. с. 150 150 150 100 100 100 50 50 50 0 2 4 6 x 0 2 4 6x 0 2 4 6 x
The correlation coefficient between the variables x and y is r=0.78 . If Sigma x=1.56, Sigma y=2.00, x bar=12,y bar=22 Find the equations of the registration lines Y on X
6. The coefficient of correlation between x and y is r = 0.59. Calculate the coefficient of determination.
13.
After gathering data about the number of starfish and measuring the pollution in areas of the ocean you find a negative linear correlation between pollution levels and number of starfish. What can you conclude based on this information? a. There is a confounding variable that is affecting both pollution and starfish. b. As pollution rises the number of starfish falls c. That pollution is causing starfish to die, leading to the negative correlation d. That pollution is supporting starfish, leading to the negative correlation
2. An aerobic exercise instructor submitted to the shipping company the data given in the following table, which shows the recommended maximum exercion heart rate for individuals of the given ages. See table below. If the Chief engineer is 62 years old, predict. naximum exercise heart rate. Age (x years) Maximum heart rate (y beats per minute) 20 40 60 170 153 136 A. What is the coefficient of correlation of the age and the maximum rate of the chief engineer? a. -100 b. 100 C. -0.99 d. 0.65
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