7. A pediatrician claims that the mean birth weight of a single-birth baby is greater than the mean birth weight of a baby that has a twin. The mean birth weight of a random sample of 85 single-birth...

detailed step by step answer please.

Extracted text: 7. A pediatrician claims that the mean birth weight of a single-birth baby is greater than the mean birth weight of a baby that has a twin. The mean birth weight of a random sample of 85 single-birth babies is 3086 grams with a standard deviation of 563 grams. The mean birth weight of a random sample of 68 babies that have a twin is 2263 grams with a standard deviation of 624 grams. At a = 0.10, can you support the pediatrician's claim? Interpret the decision in the context of the original claim.