A researcher wants to determine if the exam scores of the students are dependent on the length of time spent in studying the subject. Ten students in a certain class were taken and the results are shown in the table below where X is the time spent in studying the subject in hours and Y is the examination scores.What is the value of the correlation coefficient r.

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

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Q: If Data A has a correlation coefficient of r= -0.991, and Data B has a correlation coefficient of r=…

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A: Correlation coefficient is given by, Here sample size is n= 6

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A: From given data, X Y X*Y X*X Y*Y 116 266 30856 13456 70756 111 282 31302 12321 79524 87 282…

Q: Based on the data shown below, calculate the correlation coefficient (rounded to three decimal…

A: Solution: x y x^2 y^2 x⋅y 3 28.55 9 815.1025 85.65 4 29.2 16 852.64 116.8 5 35.55 25…

Q: Suppose in a given problem about the correlation between height and weight of 20 college students,…

A: The value of r is 0.93. The value of the correlation coefficient is, r=0.93 Thus, the value of the…

Q: Based on the data shown below, calculate the correlation coefficient (to three decimal places) x y…

A: Correlation:   A statistical method that is applied between the pairs of variables to check how the…

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Q: ΣX2 = 65        ΣY2 = 54100                       X̅ = 2.3        Y̅ = 73…

A:

Q: For a pearson correlation of r=-.85, a graph of the data should show _________ a) points widely…

A:

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A: Given data, X Y X*Y X*X Y*Y 10 100 1000 100 10000 8 120 960 64 14400 5 200 1000 25 40000…

Q: 2. Calculate Karl Pearsons co-efficient of correlation from the students. n Inches: x = 62 58 65 y =…

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Q: Based on the data shown below, calculate the correlation coefficient (to three decimal places) x y…

A: The sample size is n = 6.

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Q: Calculate the correlation coefficient, r, for the data below. X 1 3 10 7 5 4 689 2 Y 13 - 11 6 -2 -…

A:

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

A:

Q: If the correlation coefficient r is equal to 0.321, find the coefficient of determination. O a O b O…

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

Q: Find the correlation coefficient for the following data: x:     1     2     3     4     5     6…

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Q: When interpreting a correlation coefficient of 0.34, you would say that there is a linear…

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Q: Based on the data shown below, calculate the correlation coefficient (to three decimal places) x y…

A:

Q: The table below gives the amount of time students in a class studied for a test and their test…

A: X values  Y values 1031.52.751.52 7875908997858180

Q: The ages​ (in years) of 10 men and their systolic blood pressures​ (in millimeters of​ mercury) are…

A: Remove the data entry for the man who is 50  years old and has a systolic blood pressure of 199…

Q: Based on the data shown below, calculate the correlation coefficient (to three decimal places) x y…

A: We want to find correlation coefficient

Q: The following zero-order correlation coefficients are given r12 = 0.98, r13 =0.44 and r123 = 0.54.…

A:

Q: A reasonable rule of thumb is to say that the correlation is weak if less or equal than open…

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Q: If Ex=12, Ɛy=42, Ex²=46, Ɛy²=542, Exy=157and n =4, find the correlation coefficient,

A: The formula of the correlation coefficient is,

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Q: ased on the data shown below, calculate the correlation coefficient (to three decimal places) x y 1…

A: Given:

Q: A study was done asking people how much money they spend per month on their natural gas bill and how…

A: Solution:  Given information: The correlation coefficient r= 0.94  The P value for the correlation…

Q: If r is the simple correlation coefficient, the quantity r2 is known as:

A: We need to use the concept of correlation / regression analysis

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A: Given data, X Y X*Y X*X Y*Y 60 4 240 3600 16 55 3.2 176 3025 10.24 62 3.7 229.4 3844 13.69…

Q: A) Compute the value of the linear correlation coefficient for the data obtained in the study of the…

A: Part A

Q: If r= +1, the correlation is said to be a O Perfect negative correlation O Perfect positive…

A:

Q: In order for applicants to work for the foreign-service department, they must take a test in the…

A: Correlation coefficient gives the linear association between two variables. The correlation…

Q: Estimate the co-efficient of correlation between x and y from the following data and hence comment…

A:

Q: Calculate the Coefficient of Correlation between the values of X and Y from the data iven below :…

A:

Q: The store manager of a business that sells jackets is curious if the weather temperature (in degrees…

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Q: For a pearson correlation of r=-.85, a graph of the data should show _________ a) points widely…

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A:

Q: If the coefficient of correlation is equal to -0.95 the relationship between the two variables will…

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A: Correlation coefficient : Correlation coefficient  is used to measures the association or linear…

Q: e. Compute the covariance and correlation coefficient r between the right tire pressure. f. How do…

A:

Q: Based on the data shown below, calculate the correlation coefficient (to three decimal places) x y…

A: This question is related to statistics, We will solve it using given information.

Q: If the correlation coefficient obtained from data pairs of variables X and Y is 0.98 the strength…

A: correlation coefficient The correlation coefficient r measures the direction and strength of a…