Mathematics, 26.04.2020 03:03 lilxjayyy
Verify the given sums Σx, Σy, Σx2, Σy2, Σx y, and the value of the sample correlation coefficient r. (For each answer, enter a number. Round your value for r to three decimal places.)
Σx =
95
Correct: Your answer is correct.
Σy =
609
Correct: Your answer is correct.
Σx2 =
2,375
Correct: Your answer is correct.
Σy2 =
81,559
Correct: Your answer is correct.
Σx y =
13,777
Correct: Your answer is correct.
r =
0.997
Correct: Your answer is correct.
(c)
Find x bar, and y bar. Then find the equation of the least-squares line y hat = a + b x. (For each answer, enter a number. Round your answers for x bar and y bar to two decimal places. Round your answers for a and b to three decimal places.)
x bar = x bar =
y bar = y bar =
y hat = value of a coefficient
+ value of b coefficient
x
Answers: 2
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Verify the given sums Σx, Σy, Σx2, Σy2, Σx y, and the value of the sample correlation coefficient r....
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