Pearson R

In the formula of Pearson r, what is the meaning of ∑ 𝑥𝑦 ?

• sum of x-values

• sum of square x-values

• sum of the square of paired values x and y

• sum of the products of paired values x and y

In computing Pearson r, which of the following is the next step after obtaining the sum of all entries in all columns in the table?

• Construct a table.

• Complete the table.

• Simplify and compute for the value of r.

• Substitute all the sum and n in the formula.

Which of the following is the range of the correlation coefficient (r)?

• 0 ≤ r ≤ 1

• (-1 ≤ r ≥ + 1)

• -1 < r < 1

• -1 ≤ r ≤ 1

Which of the following values CANNOT represent a correlation coefficient r ?

• -1

• 1.001

• 0.25

• 0

Using the following summation values below, what is the value of Pearson r ?

n = 4 ∑ 𝑋 = 10 ∑ 𝑌 = 15 ∑ 𝑋𝑌 = 39 ∑ 𝑋 2 = 30 ∑ 𝑌 2= 65

• -0.02

• 0

• 0.23

• 1

Using the following summation values below, what is the value of Pearson r ?

n = 3 ∑ 𝑋 = 6 ∑ 𝑌 = 39 ∑ 𝑋𝑌 = 68 ∑ 𝑋 2 = 14 ∑ 𝑌 2= 557

• -1

• -0. 74

• 0

• 0.39

Based on the bivariate data below, which among the choices is the correctly constructed table?

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Which of the following is the CORRECT completed table for the bivariate data?

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When you substitute all the summation ( ∑ ) values in the formula for Pearson r, which among the choices is its best representation?

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