JUNE 2019 Q5

QUESTION 5 A researcher study on the relationship between number of absent day(s) in a semester and the test score (in percentage) of the 10 students in statistics course. The information gathered is shown below: Number of Test score Absent Day 5 65 60 5 65 4 75 85 - A 95 100 90 WAN- 75 90 a) Calculate the Pearson's Product Moment Correlation Coefficient and interpret the value obtained. (5 marks) b) Calculate the coefficient of determination and explain its meaning. (3 marks) c) Find the linear regression equation using the least-squares method. (5 marks) d) Explain the meaning of the slope obtained in (c). (2 marks) e) Estimate the test score if the student had absent for five days. (2 marks)