Find (a) the correlation (b) the covariance and (c) correlation coefficient of X and Y

Q: If X and Y are independent the correlation cofficient between X and Y is equal zero

A: If x and y are independent, means they are uncorrelated , correlation coefficient is zero. Given…

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

A: If variable X remains constant as variable Y decreases, then there is no correlation between X and…

Q: The table shows the relationship between the time spent studying and test scores for a select group…

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Q: The range of the correlation coefficient is from 0 to 1. O True O False

A: The correlation coefficient is a measure that is used to find the relationship between two…

Q: 2. Sketch the scatter plot that shows: a. Positive correlation b. Negative correlation' c. Zero…

A: Scatter plot is the graphical representation of the relationship between two variables of a…

Q: Match the linear correlation coefficient to the scatter diagram. r=- 0.933

A: The linear correlation coefficient shows the strength and direction of the linear relationship…

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: f a relationship has a weak, positive, linear correlation, the correlation coefficient that would be…

A: Correlation is defined as the linear relationship between the two variables. The range of the…

Q: Find a) the mean function for {x,}. b) the variance function for {x,}. c) the covariance for {x,}.

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Q: The value of correlation coefficient between variables X and Y lies between: A. 1 and 2 B. 0 and 1…

A: We have to identify correct option.

Q: correlation coefficient is r=

A: Correlation: Correlation is the extent of a linear relationship between two variables X and Y.   To…

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: The heights of some students were obtained. Without computation, which do you think is the…

A: Here we uave given the multiple choice question about the correlation coefficient between students…

Q: The correlation between x and y is

A: Answer: Here, option A is right. Approximately, 0.50 answeris correct.

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

A:

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

A: Here, x denotes the number of absences in Calculus course, and y final grade for 7 students.…

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

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Q: f Cov(x,y)=2 and var(x)= 9 and var(y)=16 then the correlation coefficient between x and y is

A: We have given that  Cov(x,y)=2  , Var(x)=9 and Var(y)=16

Q: Find the (а) теаns (b) varignces (c) correlations

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Q: when is the covariance or coefficient of correlation zero?

A: here given covariance or correlation coefficient is zero

Q: A researcher wants to determine if the exam scores of the students are dependent on the length of…

A: X Y X.Y X.X Y.Y 1.5 80 120 2.25 6400 3.0 83 249 9 6889 1.25 83 103.75 1.5625 6889 0.5…

Q: If Ꜫx=12, Ꜫy=42, Ꜫx²=46, Ꜫy²=542, Ꜫxy=157and n =4, find the correlation coefficient,

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

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

Q: Imagine that someone in campus life wants to convert the “Studying” scale so it’s expressed as the…

A: The data table given is:

Q: On the picture are percentages for annual sales growth and net sales attributed to loyalty card…

A: Solution: The percentages for annual sales growth and net sales attributed to loyalty card usage at…

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: The correlation coefficient, rr, is a number between 0 and 1 -10 and 10 −∞-∞ and ∞∞ 0 and 100 0…

A: Solution: Correlation: Two variables are said to be correlated if there is a linear association…

Q: When is the correlation coefficient zero?     It is never zero.     when there is no linear…

A: The objective is to find when is the correlation coefficient zero.

Q: Find the correlation coefficient (r)? xy

A: Given data,

Q: The following table shows the approximate number of wireless telephone subscriptions in a certain…

A: Given that, The data of the wireless telephone subscription for certain years are given : To obtain…

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: Find (i) the Mean of X, (ii) Coefficient of correlation between X and Y.

A: here given N= 50 regression equation X on  Y is 3Y-5X = -180 variance of X is 9/16 of variance of X…

Q: Determine whether the correlation is most likely to be positive, negative, or zero between the…

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Q: Calculate the correlation coefficients rxy, rxz, and ryz.

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Q: i. Determine i. Determine the covariance the correlation of X and Y. of X and Y.

A: From the given information, fx,y=x2+xy3, 0<x<1, 0<y<2gx=2xx+13hy=13+y6 i) Covariance of…

Q: find the coefficient of determination, given that the value of the linear correlation coefficient,r,…

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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: How is correlation defined?

A: Correlation is a term that is a measure of the strength of a linear relationship between two…

Q: Number of Final exam absences grade 4 72 1 97 3 87 57 92 82 2 92 3.

A: We have given that  X = represent the number of absences Y = represent the number of final grade

Q: Squaring the Pearson correlation coefficient (r2) tells us that

A: Coefficient of Determination: Square of the correlation coefficient is known as the coefficient of…

Q: The coefficient of correlation lies between -1 and +1. Symbolically, -1 <r<+1 or|r|s1

A:

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: Given values of x and y, the correlation has a. very strong relationship. b. very strong negative…

A: Given: X Y 3 4 2 5 1 8 4 4 6 2

Q: The linear correlation coefficient is r

A: The linear correlation coefficient tells the strength of the linear relationship between two…

Q: Find the correlation coefficient.

A:

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

A:

Q: When is the correlation coefficient zero? It is never zero. when there is no linear correlation when…

A: According to the given information, we have Correlation coefficient is given.