What does the ricardian theory state? countries should produce all goods and services if they can countries should not produce goods and services that minimize opportunity costs countries should import goods and services if they are cheaper in other countries countries should export all goods and services if they make a profit

Explain the difference between an independent and dependent sample. choose the correct answer below. a. in an independent sample, the individuals are chosen without replacement; in a dependent sample, the individuals are chosen with replacement. b. in a dependent sample, one would use a two-tailed hypothesis test; in an independent sample, one would use a one-tail hypothesis test. c. a sample is independent when an individual selected for one sample does not dictate which individual is to be in the second sample. a sample is dependent when an individual selected for one sample dictates which individual is to be in the second sample. d. a sample is independent when an individual selected for one sample dictates which individual is to be in the second sample. a sample is dependent when an individual selected for one sample does not dictate which individual is to be in the second sample. independent samples are often referred to as matched-pairs samples.

According to the aztec history, how did the aztecs know where to build their new city of tenochtitlan? why was this a good location?

Why do you think that historians use the word “revolution” to describe important changes in agriculture? how did the green revolution and other agricultural revolutions change the lives of billions of people? < < read less