QUESTION 24 Consider the following data x 81 75 71 61 96 56 85 18 y 80 82 83 57 100 30 68 56 (a) Calculate the covariance of x and y, denoted Sx y: (4) (b) Calculate the least

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A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

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Q: A sales manager collected the following data on x = years of experience and y = annual sales…

A: a) SST = 2572, SSR = 2272, and SSE = 300 b) r2 ≈ 0.883 The least squares line provided a good fit as…

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A: Solution: From the given information, the test statistic is z=2.15 and the test is right-tailed.

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Q: {(2, -5). %3D

A: x¯=∑xn = 5.2 y¯=∑yn = -8.6 covariance (x,y) = ∑(x-x)(y-y)n-1 = -9.1 std.dev(x) = ∑(xi-x)n-1 = 2.588…

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A: From given data, X Y X*Y X*X Y*Y 5 12 60 25 144 2 10 20 4 100 9 15 135 81 225 3 11 33 9…

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A: Calculation: (A) The correlation coefficient is,

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A: From the provided information, x 31 22 23 33 27 21 22 19 31 16 y 25…

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Q: DATAfile: Exer2 A statistical program is recommended. Consider the following data for a dependent…

A: There are 2 independent variables and 1 dependent variable. We have to find the regression equation…

Q: A sales manager collected the following data on x = years of experience and y = annual sales…

A: Salesperson Years ofExperience x Annual Sales($1,000s) y 1 1 80 2 3 97 3 4 92 4 4 107 5 6…

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A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: I need help with this please

A: Steps to follow to perform Regression Analysis in Excel:Step 1: Copy the values on an Excel…

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A: Correlation coefficient is denoted by r

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A: From the provided information, x y 77 81 50 67 71 79 72 36 83 48 94 84 96 99 99…

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A: From given data, X Y X*Y X*X 11 32 352 121 12 35 420 144 15 37 555 225 16 41 656 256 21…

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A: Procedure to perform regression analysis using Excel: Enter the data of y, x1, and x2 (in different…

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A: The data is defined below as follows:  From the information, given that

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Q: particular location. The accompanying values were read from the plot. x7 12 14 17 23 30 40 47 55 67…

A: XY7412101413171423153025402747455538674672538471968211299127104

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A: *Answer:

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A: In this case car age (x) the independent variable and repair cost (y) is the dependent variable.

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A: A).

Q: Consider the following table of data. x 0 1 2 y 4 1 0 1 3 4 1 4 (a) Calculate the least squares line…

A: x y xy x^2 X = x-x̄ Y= y -  ȳ XY 0 4 0 0 -2 2 -4 1 1 1 1 -1 -1 1 2 0 0 4 0 -2 0 3 1 3 9 1 -1…

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A: a)

Q: (b) For the  (x, y)  data set of part (a), compute the equation of the sample least-squares line  ŷ…

A: b. Since y is the original data shifted ahead by one period, the paired data, (x, y) is as follows:…

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A: I am using Excel and the command is as follows