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PROBLEM SET UNIT Problems Suppose you want to determine if the number of hours studying for an exam is associated with the score the students obtained. To do this, you randomly selected 16 students, asked them how many hours they studied for the exam (X), and what are their scores in the exam (Y). X 15.0 9.5 12.5 8.0 14.0 7.0 10.5 6.5 Y 97.9 82.6 93.0 82.3 100.0 81.9 89.2 78.4 X 8.5 11.0 7.5 3.0 5.5 4.5 9.0 5.0 Y 81.5 92.3 85.7 63.2 74.8 70.5 87.6 75.0 a. Construct a scatterplot and describe the relationship between X and Y. b. Calculate for the sample correlation coefficientr between X and Y. Describe the association and use this to support the pattern you see in the scatterplot. c. Test if there is a linear relationship between the number of hours studying and exam scores at 0.01 level of significance.

PROBLEM SET UNIT Problems Suppose you want to determine if the number of hours studying for an exam is associated with the score the students obtained. To do this, you randomly selected 16 students, asked them how many hours they studied for the exam (X), and what are their scores in the exam (Y). X 15.0 9.5 12.5 8.0 14.0 7.0 10.5 6.5 Y 97.9 82.6 93.0 82.3 100.0 81.9 89.2 78.4 X 8.5 11.0 7.5 3.0 5.5 4.5 9.0 5.0 Y 81.5 92.3 85.7 63.2 74.8 70.5 87.6 75.0 a. Construct a scatterplot and describe the relationship between X and Y. b. Calculate for the sample correlation coefficientr between X and Y. Describe the association and use this to support the pattern you see in the scatterplot. c. Test if there is a linear relationship between the number of hours studying and exam scores at 0.01 level of significance.

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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Help me atleast letters a and b please. Badly need ur help.

Statistics and Probability PROBLEM SET UNIT Problems Suppose you want to determine if the number of hours studying for an exam is associated with the score the students obtained. To do this, you randomly selected 16 students, asked them how many hours they studied for the exam (X), and what are their scores in the exam (Y). 15.0 9.5 12.5 8.0 14.0 7.0 10.5 6.5 Y 97.9 82.6 93.0 82.3 100.0 81.9 89.2 78.4 8.5 11.0 7.5 3.0 5.5 4.5 9.0 5.0 Y 81.5 92.3 85.7 63.2 74.8 70.5 87.6 75.0 Construct a scatterplot and describe the relationship between X and Y. а. b. Calculate for the sample correlation coefficient r between X and Y. Describe the association and use this to support the pattern you see in the scatterplot. c. Test if there is a linear relationship between the number of hours studying and exam scores at 0.01 level of significance. d. Find the equation of the straight line that fits the data best and interpret the slope. e. Determine and interpret the coefficient of determination R2. f. Predict the average exam score when a student studied for 14.5 hours.
Transcribed Image Text:Statistics and Probability PROBLEM SET UNIT Problems Suppose you want to determine if the number of hours studying for an exam is associated with the score the students obtained. To do this, you randomly selected 16 students, asked them how many hours they studied for the exam (X), and what are their scores in the exam (Y). 15.0 9.5 12.5 8.0 14.0 7.0 10.5 6.5 Y 97.9 82.6 93.0 82.3 100.0 81.9 89.2 78.4 8.5 11.0 7.5 3.0 5.5 4.5 9.0 5.0 Y 81.5 92.3 85.7 63.2 74.8 70.5 87.6 75.0 Construct a scatterplot and describe the relationship between X and Y. а. b. Calculate for the sample correlation coefficient r between X and Y. Describe the association and use this to support the pattern you see in the scatterplot. c. Test if there is a linear relationship between the number of hours studying and exam scores at 0.01 level of significance. d. Find the equation of the straight line that fits the data best and interpret the slope. e. Determine and interpret the coefficient of determination R2. f. Predict the average exam score when a student studied for 14.5 hours.
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