- Please Double Check The Answers 1 (41.2 KiB) Viewed 120 times
please double check the answers
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answerhappygod
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please double check the answers
please double check the answers
For the data shown to the right, determine the linear correlation coefficient using two different formulas shown below. Complete parts (a) and (b) below and compare your answers. a. Use the definition r = 1-12 (x₁-x) (V₁-y) Sx Sy Find the sum required to calculate r using the definition. Σ(x₁-x) (V₁-) = 0.642 (Type an integer or a decimal. Do not round.) Using the definition, r = 0.642 (Round to three decimal places as needed.) b. Use the computing formula r = Σxy; - (Σ×) (Σy) / n [Σx² - (Ex)² /n] [Ex? - (Σx₁)²/n] Find the sums required to calculate r using the computing formula. Ex= 18| 2y = 15 Exiyi = 34 Ex? = 76 2y = 31| (Type integers or decimals. Do not round.) Using the computing formula, r=0.642. (Round to three decimal places as needed) y 3 4 5 5
For the data shown to the right, determine the linear correlation coefficient using two different formulas shown below. Complete parts (a) and (b) below and compare your answers. a. Use the definition r = 1-12 (x₁-x) (V₁-y) Sx Sy Find the sum required to calculate r using the definition. Σ(x₁-x) (V₁-) = 0.642 (Type an integer or a decimal. Do not round.) Using the definition, r = 0.642 (Round to three decimal places as needed.) b. Use the computing formula r = Σxy; - (Σ×) (Σy) / n [Σx² - (Ex)² /n] [Ex? - (Σx₁)²/n] Find the sums required to calculate r using the computing formula. Ex= 18| 2y = 15 Exiyi = 34 Ex? = 76 2y = 31| (Type integers or decimals. Do not round.) Using the computing formula, r=0.642. (Round to three decimal places as needed) y 3 4 5 5