When testing the difference of means for paired data, what is the null hypothesis?

Which article of the us constitution addresses the issue of interpeting the laws of the united states

What role did radio free europe play in western countries' cold warstrategy?

Which two characteristics belong to mahayana buddhism. a.followers worship and offer animal sacrifice at festivals b.a followers highest aim is to attain the status of a bodhisattva c.an emphasis is placed on fulfilling sensual pleasure d.this form of buddhism is the most acient for od buddhism that exists today e.followers belive that everyone is capable of attaining enlightenment