An expert wants to determine whether the time that an assembly worker requires to perform a standard task might be related to the number of years on the job and has collected the data shown in the following table: Worker Time (in minutes) (y) Years on j 1 12 2 16 3 21 4 17 5 19 6 23 7 9 8 13 9 30 10 28 The equation of the linear regression line is equal to: A. $\hat{y} = 6.8269 - 0.1344x$ B. $\hat{y} = 24.2993 - 1.2789x$ C. $\hat{y} = -1.2789 - 24.2993x$ D. $\hat{y} = -0.1344 + 6.8269x$
Added by John R.
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To calculate the mean of y, add up all the values of y and divide by the total number of values: mean(y) = (12 + 16 + 21 + 17 + 19 + 23 + 30 + 28 + 13) / 9 = 179 / 9 = 19.89 To calculate the mean of x, add up all the values of x and divide by the total number of Show more…
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