From the following data calculate(i) Correlation coefficient(ü) Standard Deviation of Y (Gy)X=-85 YY= 89 XGz=3

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Answered: From the following data calculate (i)…

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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The relationship between the cost of a taxi ride (y) and the length of ride (x) is analyzed and is determined to be linear. The mean length was 3.9 miles with a standard deviation of 0.8 mile(s). The mean cost was $9.49 with a standard deviation of $1.7. The equation of the regression model is: =2.53+ 1.79 x Find the correlation coefficient r. What does the correlation coefficients tell us? (please circle all that are true) The linear relation between x and y is positive The linear relation between x and y is negative Suppose the critical value is 0.5798. (please circle all that are true) The correlation coefficient is significantly different from zero. The linear relation between length of ride and the cost is strong. The correlation coefficient is NOT significantly different from zero. The linear relation between the length of ride and the cost is weak. Explain in context what the number 1.79 in the regression model means. Explain in context what the number 2.53 in the…
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Many high school students take either the SAT or the ACT. However, some students take both. Data were collected from 60 students who took both college entrance exams. The average SAT score was 912 with a standard deviation of 180. The average ACT score was 21 with a standard deviation of 5. The correlation between the two variables equals 0.817.(a) To predict the SAT score (y) from a student’s ACT score (x), what is the equation of the least-squares regression line? (b) What fraction of the variation in the values of the SAT scores is accounted for by the linear relationship between SAT and ACT scores?
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From the following data calculate (i) Correlation coefficient (ü) Standard Deviation of Y (Gy) X=85 Y Y= 89 X Gx=3