1010101010(I) If Ex, = 65, Ey, = 40, >x =925, Ey = 400 and Ex, y, = 584, then findi=1i=li=1i=1i=1the correlation coefficient between X and Y.

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Answered: 10 10 10 10 10 ()f Σ , - 65, Σ) 40, Σ=…

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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7. A company wanted to assess the impact of R and D expenditure (x) on annual profit (v) following table presents data for past 8 years. X: 7 5 10 4 5 3 y: 45 42 41 60 30 34 25 Compute the correlation co-efficient. Comment on the value. 20
69 Q1. [6 points] :From the following data set 3\ 9. 1 6. 5. 4 11 16 1.find correlation coefficients 2. Estimate the simple linear regression model 3. Find the predicted value of y when x-10
ample 8•10. A computer while calculating correlation coefficient between two variables X and Y from 25 pairs ofobservations obtained the following results. n = 25, ΣχΕ 125, Ex2= 650, "Ey = 100, Σy-460 ΣΧΥ-508 correctly Prove that the It was, however, discovered at the time of checking that two pairs of observations were copied They noere taken as (6, 14) and (8, 6) while the correct values were (R, 12) and (6, correct value of the correlation coefficient should be 2/3.
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6
Q2) The following data represents the results of an experimental test, if the relation between variables take the form y=ae^(bvx) y = aeb√x X 4 7 12 15 24 y 13 10 9 7 4 * the correlation coefficient of the above (2 relation 0.9927 0.9727 0.9772 0.9977 none of all above
A7. Calculate Α correlation coefficient from the following data: N- 10, Σ X= 140, Σ Υ=150 Σ (X- 10)7Ξ 180, Σ (Y- 15)2215, Σ(Χ-10) (Υ-15)-69
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K30 1J يقوم الانتقال إلى سؤال آخر بحفظ هذا الرد. 1. درجات The correlation coefficient is used to determine: A specific value of the y-variable given a specific value of the x-variable. A specific value of the x-variable given a specific value of the y-variable. None of these The strength of the relationship between the x and y variables. 30 1J يقوم الانتقال إلى سؤال آخر بحفظ هذا الرد. 44 F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 Pause Break PrtSCE %23 3r %24 .48 & 50 6 7 7 V 8 A 9 9

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10 10 10 10 10 ()f Σ , - 65, Σ) 40, Σ= 925, ΣΥ? = 400 and >x,y, = 584, then find i=l i=1 i=1 i=1 the correlation coefficient between X and Y.