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Answer for Question 2, Parts A, B, and C.

Answer for Question 2, Parts A, B, and C.

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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Answer for Question 2, Parts A, B, and C.

1) A researcher wants to know whether the number of hours students spent on social networking sites (e.g., Facebook, Instagram) is correlated with how long they study for final exams. The researchers asks 5 students at UCI to report their scores on these two continuous variables: Time on Social Networking Sites Time Spent Studying for Finals (hours) 2 5 7 3 9 (hours) 10 5 4 8 a) Create a scatter diagram for this correlation with Time on Social Networking Sites along the x-axis. b) Describe the pattern of the data points in terms of the strength and direction of the correlation. 2) The researcher now wants to know whether the number of hours students spend on social networking sites predicts how much time they study for final exams: a) Draw a regression line on the scatter diagram reflecting the prediction rule: Y = 10.30.88(X) b) What is the predicted amount of time spent studying if a student spends no time on social networking sites? c) How should the regression coefficient be interpreted?
Transcribed Image Text:1) A researcher wants to know whether the number of hours students spent on social networking sites (e.g., Facebook, Instagram) is correlated with how long they study for final exams. The researchers asks 5 students at UCI to report their scores on these two continuous variables: Time on Social Networking Sites Time Spent Studying for Finals (hours) 2 5 7 3 9 (hours) 10 5 4 8 a) Create a scatter diagram for this correlation with Time on Social Networking Sites along the x-axis. b) Describe the pattern of the data points in terms of the strength and direction of the correlation. 2) The researcher now wants to know whether the number of hours students spend on social networking sites predicts how much time they study for final exams: a) Draw a regression line on the scatter diagram reflecting the prediction rule: Y = 10.30.88(X) b) What is the predicted amount of time spent studying if a student spends no time on social networking sites? c) How should the regression coefficient be interpreted?
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