refer to the newborn birth weight data.

Answer parts a, b and c.

Part (a):

Month At birth 2 months 4 months 6 months Weight group Mean SD Mean SD Mean SD Mean SD NBW 49. 18 1.93 57.30 2.40 62.60 2.23 66.30 2 25 LBW 46.45 1.95 55.00 2.44 60.60 2.50 64.80 2.40 VLBW 39.13 3.34 48.20 4.18 55.00 3.15 59.18 3.73