Find the coefficient of correlation between X + Y and X-Y.

Q: The table below shows the number of absences, x, in a Statistics course and the final exam grade, y,…

A: Correlation: Correlation a measure which indicates the “go-togetherness” of two data sets. It can be…

Q: 3. If the correlation coefficient is -0.03, is its relationship considered to be strong positive,…

A: Correlation: The extent linear relation between the two variables is called as correlation. Positive…

Q: A fair coin is tossed three times (consecutively). If X is the number of heads of the first shot and…

A: GivenX represent the number of heads in first toss.So X can take values {0,1} Y represents the…

Q: How do you calculate a coefficient of correlation of two indexes’ returns?

A: Let the two indexes’ returns be A and B.The coefficient of correlation measures the degree to which…

Q: A Correlation shows an association only between two variables

A: The degree in which an independent variable causes changes observed in the dependent variable is…

Q: Which shows the strongest linear correlation?

A: Hence, We can see in the scatter plot (c), there is the strongest linearly negative correlation.

Q: When you solve and get an r value for the correlation coefficient, what information is revealed by…

A: We know that Correlation measures tye association between the two variables.  If two variables move…

Q: What does it mean when the correlation coefficient of variables A and B is -0.5?

A: The correlation coefficient of variables A and B is -0.5.

Q: Calculate the coefficient of correlation between x and y. 4 6 8 y 5 9. 13 17

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Q: A fair coin is tossed three times (consecutively). If X is the number of heads of the first shot and…

A: It is an important part of statistics . It is widely used .

Q: What does it mean when the correlation coefficient of variables A and B is -0.5? Explain.

A: Given that the correlation coefficient of variables A and B is -0.5.

Q: The correlation coefficient always moves between 0 and 1. True or False.

A: The correlation coefficient can be negative, zero or positive.

Q: Calculate the coefficient of correlation between x and y. 2 4 y 5 9. 13 17

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Q: Explain the physical significance of auto correlation.

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Q: Use Spearman's formula to find the rank Correlation Coefficient.

A: Given that  Number of students n = 15 First we have to calculate the difference d between ranks of…

Q: Explain what it means when a correlation between the variables X and Y have anr2of 0.72.

A: The value of R2 is 0.72.

Q: If the coefficient of correlation between two variables is -0.6, their coefficient of determination…

A: Given: Correlation coefficient (r) = -0.6

Q: If the coefficient of correlation between two variables is -0.6, What is the coefficient of…

A:

Q: What are some of the possible reasons for large correlations between a pair of variables, X and Y?

A: Correlation is defined as a measure of the linear relationship between two quantitative variables.

Q: Because a partial correlation considers the influence of a third variable, it is possible to have a…

A: From the above question Because a partial correlation considers the influence of a third variable,…

Q: Describe the relationship between two variables when the correlation coefficient r is near 0.

A: To define the relationship between two variables.

Q: Find the Covariance and the Correlation between X and Y

A: Given: n=5 The covariance and correlation are calculated as…

Q: In linear regression, the mean value of all residuals will be greater for a correlation of -.70 than…

A: The mean (or expected) value of all residuals will be greater for correlation of -0.70 than for a…

Q: A study of new cars finds that the correlation between the weight of cars (pounds) and their city…

A:

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

A:

Q: What is the correlation between x

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Q: Compute the correlation coefficient (r) of consumption and price

A: Given data: Consumption Price 0.386 1.35 0.474 1.5 0.393 1.39 0.425 1.49 0.406 1.36…

Q: If the correlation coefficient between X and Y is equal to zero, then:

A: Given that the correlation coefficient between X and Y is equal to zero. That is,…

Q: If variable X remains constant as variable Y decreases, the correlation is said to be: zero negative…

A: We have to find  correct answer.

Q: Show that correlation coefficient lies between 1 and -1.

A: 6:we have to show that correlation coefficient is lies between 1 and -1correlation coefficent is…

Q: Find the correlation

A: Answer: For the given data,

Q: Solve for the coefficient of correlation

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

Q: The correlation coefficient betweem anxiaty and exam scorea of the students is -0.6 .so what is the…

A: Here correlation coefficient is negative. Therefore as exam score increases anxiaty decreases.  60℅…

Q: Find the linear correlation coefficient for the data

A: Let X denotes the placement exam rating And Y denote the GWA of students.

Q: Compute the correlation coefficient p for X and Y.

A: The expected value of x2 is,…

Q: if the slope is negative then is the correlation coefficient also negative?

A: Given: the slope of the regression line is -ve then the correlation coefficient is -ve.

Q: Find the cross correlation function between the processes?

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Q: Find the correlation coefficient.

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Q: f the Pearson correlation between X and Y is r = .50, then the regression equation predicts 25% of…

A: Obtain the value of the coefficient of determination.   The value of the coefficient of…

Q: Calculate the correlation coefficients rry, rrz, and ryz-

A: Here, x y x-x y-y (x-x)(y-y) (x-x)2 (y-y)2 1 0 -5 -2.45 12.25 25 6.0025 2 0 -4 -2.45 9.8 16…

Q: If the coefficient of determination is 0.81, the correlation coefficient %3D

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

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Q: Draw the scatterplot that shows: a. Positive correlation b. Negative correlation

A: Scatterplot for Positive correlation: Positive correlation: It exists when two variables move in…

Q: A correlation of r=1.2 is not possible? Define?

A: Given that, A correlation of r=1.2