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What is the value of r? a. -0.11 b. -0.24 c. 0.25 d. 0.32

What is the value of r? a. -0.11 b. -0.24 c. 0.25 d. 0.32

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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2. An education researcher wishes to determine the extent of relationship of the results between the reading comprehension test (x) and the vocabulary test (y) among 12 students. The data shows the following values: Ex = 76, Ey = 119, Ex^2 = 678, Ey^2 = 1561, Exy = 724. What is the value of r? a. -0.11 b. -0.24 c. 0.25 d. 0.32 3. Given: X = 49, X = 52, s = 2.1. What is the coefficient of skewness (sk)? a. -4.29 b. -1.43 c. 1.43 d. 4.29 4. A survey of 40 men regarding their shoe sizes (x) and their heights (y) were obtained. What is the likely height of a man with a shoe size of 10 based on the obtained regression equation, y = 130.4+ 4.7x? a. 177.4 cm b. 182.1 cm c. 186.8 cm d. 190.3 cm
Transcribed Image Text:2. An education researcher wishes to determine the extent of relationship of the results between the reading comprehension test (x) and the vocabulary test (y) among 12 students. The data shows the following values: Ex = 76, Ey = 119, Ex^2 = 678, Ey^2 = 1561, Exy = 724. What is the value of r? a. -0.11 b. -0.24 c. 0.25 d. 0.32 3. Given: X = 49, X = 52, s = 2.1. What is the coefficient of skewness (sk)? a. -4.29 b. -1.43 c. 1.43 d. 4.29 4. A survey of 40 men regarding their shoe sizes (x) and their heights (y) were obtained. What is the likely height of a man with a shoe size of 10 based on the obtained regression equation, y = 130.4+ 4.7x? a. 177.4 cm b. 182.1 cm c. 186.8 cm d. 190.3 cm
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