Nahya infant weights A study of nutrition in developing countries collected data from the Egyptian village of Nahya. Here are the mean weights

(in kilograms)

for 170 infants in Nahya who were weighed each month during their first year of life:

Age (months): 1 2 3 4 5 6 7 8 9 10 11 12 Weight (kg): 4.3 5.1 5.7 6.3 6.8 7.1 7.2 7.2 7.2 7.2 7.5 7.8 A hasty user of statistics enters the data into software and computes the least-squares line without plotting the data.

The result is weight = 4.88 + 0.267 (age). A residual plot is shown below. Would it be appropriate to use this regression line to predict y from x? Justify your answer.

Transcribed Image Text:

Residual 0.50- 0.25- . 0.00- -0.25- -0.50- -0.75- -1.00-L 0 2 6 Age (months) 8 10 12