Calculate the correlation co-efficient by first multiplying each X and Y by 10 a nting 70 from each X and 60 from each Y.

Q: Suppose the coefficient of correlation for two variable is r= -0.811. O 0.811 O -0.811 O 0.658 O Not…

A: Given, Coefficient of correlation (r)=-0.811 Coefficient of determination (r2)=?

Q: Here is a Divanate data set. x y 51.9 153.3 81.9 48.6 83.3 49.8 47.2 109.2 85.5 55.1 68.4 40 49.7…

A: Solution: x y x^2 y^2 x⋅y 51.9 153.3 2693.61 23500.89 7956.27 81.9 48.6 6707.61 2361.96…

Q: Find the auto correlation function.

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Q: A computer while calculating correlation coefficient between two variables X and Y from 25 pairs of…

A: Given  n=25, ∑x=125, ∑x2= 650, ∑Y=100, ∑y2=460, ∑xy=508 Standard deviation=√variance  We want to…

Q: b. Calculate the Product Moment Correlation Coefficient, r, and describe the relationship shown on…

A: b. x y xy x2 y2 15 104 1560 225 10816 17 113 1921 289 12769 20 188 3760 400 353444 25 275…

Q: Calculate correlation coefficient from the following results : N = 10, EX = 100, ΣX-10,- 180,…

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Q: Prove that the correlation coefficient r lies between -1 and +1?

A: We need to prove that correlation coefficient lie between -1 and +1

Q: Calculate correlation coefficient from the following data : N= 10, Σ X= 140 , Σ Υ-150 E (X – 10)2 =…

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Q: Suppose the correlation coefficient between the number of professional sports teams in a city and…

A: Let the number of hospitals be x and the number of sports team be y Therefore- x=0.72y Now for y=1,…

Q: Find correlation in detail with every step. with respect to x,y, and z values as given in the table

A: The correlation is used to understand the strength of association between the two or more variables.…

Q: If correlation of X and Y is equal to 0, prove that correlation of x< and y may not be equal to 0.

A: Correlation: Correlation analysis is used to measure the strength of the association between…

Q: Calculate Coefficient of Correlation from the following results: 100, ΣΥ- 150 Σ(X- 10)%= 180, Σ (Y-…

A: Answer:

Q: A set of n = 15 pairs of scores (X and Y values) produces a correlation of r = 0.30. If each of the…

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Q: The correlation coefficient, r, is a nurmber between 00 and 00 O-1 and 1 00 and 1 O-00 and 00 O-10…

A: The Pearson correlation coefficient used to define the relationship between two quantitative…

Q: 1.2. Calculate the correlation of coefficient (r).

A: Here, Two variables are given, X : Income per annum (in R 1000)  Y : Life Insurance (in R 1000) The…

Q: For a correlation of -.64 between X and Y, each 1-SD change in corresponds to a predicted change of…

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Q: If x and y are two uncorrelated variables and u=x+y, v =x- y, find the coefficient of correlation…

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Q: Show that the correlation coefficient between Wj and W2, pw,,W2, is such that |pyj.Y2| = lew1,w2l- a

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Q: Which value of r indicates a stronger correlation than +0.40 0.38 -0.30 -0.80 0

A: r (correlation coefficient): Measure of linear association between two variables.

Q: choose the weakest correlation: 0.57 -0.75 -0.43 0.65

A: The larger the magnitude of the value of r, the stronger the correlation. The smaller the magnitude…

Q: Calculate correlation coefficient from the following data : N= 10 , Σ X= 140 , Σ Υ-150 Σ (X-10)=180,…

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Q: Calculate correlation coefficient from the following results : N 10 ΣΧ 100 I(X-10) = 180, £(Y-15)² =…

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Q: The correlation coefficient (r) between the number of volunteers x and the number of bags of trash…

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Q: n=13, sum x=120, sum y=340, sum xy=3970, Sigma x^ 2 =1320, Sigma y^ 2 =255555 Calculate the linear…

A: Given n=13, sum x=120, sum y=340, sum xy=3970, Sigma x^ 2 =1320, Sigma y^ 2 =255555

Q: When rs = 0.3 and x = 10. It was later discovered that the difference in ranks in two subjects by…

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Q: e found to have a strong positive linear correlation. Pick the 0.37x + 25 D.87x + 25 7х — 25 — 25 -

A: The regression line is of the form, Y = a+ bx Here b is the slope and a is the intercept. If the…

Q: If the correlation between X and Y is r = -0.61 and if the standard deviations of X and Y…

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Q: Obtain the rank correlation co efficient for the following data : X: 68 Y: 62 64 75 50 64 80 75 40…

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Q: Order each r value from the weakest (1) to the strongest (6) correlation.

A: Given correlation values  r1=0.15, r2=-0.99,r3=0.43, r4=-0.29 r5=0.95 ,r6=-0.5  to arrange the…

Q: For a correlation of -.64 between X and Y, each 1 _SD change in Zx corresponds to a predicted change…

A: It is provided that the correlation between X and Y is -0.64. So, r = -0.64.We have the relation, Zy…

Q: In order to indicate a strong negative correlation between variables, the correlation coefficient…

A: Definition used -                 Negative correlation -                             From the…

Q: The df for the correlation are based on the number of observations minus 2.   a) True    b) False

A: Correlation :  A correlation is a statistical test that demonstrates the relationship between two…

Q: Which is the strongest (highest) r correlation:  -0.9000 -0.6000 -0.3000 0.4500

A: Correlation r is lies between -1 and 1. The value of r near to 1 in absolute value gives the…

Q: The management of a supermarket wants to find if there is a relationship between the number of times…

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Q: Solve for the coefficient of correlation

A: The given variables are sales revenue and product price.

Q: For a correlation of -64 between X and Y, each1-SD change in zx corresponds to a predicted change of…

A: For each standard deviation increase in , then Y changes by r Standard deviations.

Q: (a) Establish the following relationship for coefficient of correlation, Cou(x,y)! where the symbols…

A: Karl Pearson's coefficient of correlation aims to give a standardized linear relationship between…

Q: n of

A: correlation is a statistical tool it tells us the relationship between two variables.it shows the…

Q: A research was conducted to observe the effect of sunlight exposure on vitamin D concentration among…

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Q: Find r2 if the correlation coefficient is 0.92.   Only round your final answer to 2 decimal places.

A: Given: correlation coefficient r=0.92  Then calculate the coefficient of determination (r2) ??

Q: Calculate correlation coefficient from the following information: N= 10, ΣX = 140 , ΣY = 150,…

A: Correlation Coefficient: Let us assume (x1, y1), (x2, y2), ... , (xn, yn) be n set of observations…

Q: jects obtained by one of the students was wrongly taken as 7 instead of 9. Find the correct…

A: Here use formula of rank correlation coefficient

Q: Compute the correlation coefficien x16 52 3 y1 365 4

A: x = 1,6,5,2,3 y= 1,3,6,5,4

Q: Find correlation coefficient  If xi 0 11 21 23 14 25 yi 5 43 45 47 51 54

A: GIven data,

Q: Calculate the correlation coefficient r, letting Row 1 represent the x-values and Row 2 the…

A: Given: Row 1 Row 2 19 156 23 155 31 190 49 141 51 202 70 191 79 181

Q: The correlation coefficient O a. can be less than -1 b. is the same as the covariance C. cannot be…

A: We have to find the coreation coefficient.

Q: Suppose f(x,y)=10x2y, 0<y<x<1, What is the Correlation of the variable X and Y?

A: We have E[X] = 0.833 E[X2] = 0.714 Var(X) = 0.0201   E[Y] = 0.556 E[Y2] = 0.357 Var(Y) = 0.0479…

Q: Use the equation below for calculating the correlation co-efficient, r to state when the correlation…

A: This is a problem of theoretical distribution.

Q: (i) Find the auto-correlation of Y(t).

A: