Matrilineal descent is typically difficult for americans to grasp because it feels so unnatural to us. what explains this feeling that matrilineal descent is unnatural since as americans we also recognize that we are descended from one mother and her parents?

The kamp family has twins, rob and rachel. both rob and rachel graduated from college 2 years ago, and each is now earning $50,000 per year. rachel works in the retail industry, where the mean salary for executives with less than 5 years' experience is $35,000 with a standard deviation of $8,000. rob is an engineer. the mean salary for engineers with less than 5 years' experience is $60,000 with a standard deviation of $5,000.