robert7248
robert7248 robert7248
  • 09-05-2019
  • Mathematics
contestada

What is the r-value of the following data to three decimal places?

A. -0.811
B. 0.811
C. 0.901
D. -0.901

What is the rvalue of the following data to three decimal places A 0811 B 0811 C 0901 D 0901 class=

Respuesta :

sethsimmons1234
sethsimmons1234 sethsimmons1234
  • 09-05-2019

Answer:

-0.9007 it would be D. if I'm right

Step-by-step explanation:

X Values

∑ = 34

Mean = 6.8

∑(X - Mx)2 = SSx = 140.8

Y Values

∑ = 54

Mean = 10.8

∑(Y - My)2 = SSy = 164.8

X and Y Combined

N = 5

∑(X - Mx)(Y - My) = -137.2

R Calculation

r = ∑((X - My)(Y - Mx)) / √((SSx)(SSy))

r = -137.2 / √((140.8)(164.8)) = -0.9007

Meta Numerics (cross-check)

r = -0.9007

Answer Link

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