Question

\( \begin{array}{l}r=\frac{n \sum x y-\sum x \sum y}{\sqrt{\left[n \sum x^{2}-\left(\sum x\right)^{2}\right]\left[\Sigma y^{2}-(\Sigma, y)^{2}\right]}} \\ r=\frac{9787-76(591)}{\sqrt{\left.1420-(76)^{2}\right]\left[72,421-(591)^{2}\right]}}\end{array} \)

          \( \begin{array}{l}r=\frac{n \sum x y-\sum x \sum y}{\sqrt{\left[n \sum x^{2}-\left(\sum x\right)^{2}\right]\left[\Sigma y^{2}-(\Sigma, y)^{2}\right]}} \\ r=\frac{9787-76(591)}{\sqrt{\left.1420-(76)^{2}\right]\left[72,421-(591)^{2}\right]}}\end{array} \)

r=(n ∑ x y-∑ x ∑ y)/(√([n ∑ x^2-(∑ x)^2][Σ y^2-(Σ, y)^2]))
r=(9787-76(591))/(√(.1420-(76)^2][72,421-(591)^2]))

Added by Jasmine

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Chapter 10

Instant Answer

Solved by Expert Umar Sohail Qureshi

Step 1

The formula for the numerator is \( n \sum xy - \sum x \sum y \). Plugging in the given values: \[ n \sum xy = 9787, \quad \sum x = 76, \quad \sum y = 591 \] Calculate \( \sum x \sum y \): \[ \sum x \sum y = 76 \times 591 = 44916 \] Show more…

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