Q3

QUESTION 3 A study was conducted to investigate the relationship between birth weight (in kilograms) and pregnancy age (in weeks) for newborn babies. The data are as follow: Pregnancy age (Week) Birth weight (Kilograms) Draw a scatter diagram for the above data and interpret the relationship between the two variables. (4 marks) Calculate the product moment correlation efficient between the birth weight and pregnancy age. Comment on the result obtained. (5 marks) Find the least squares regression equation. (5 marks) Interpret the value of the slope obtained in (c). (2 marks) Calculate the coefcient of determination and explain its meaning. (2 marks) Predict the birth weight of the newborn given that the pregnancy age is 39.4 week. (2 marks)