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

would it be plagiarism to copy and paste off of here? ?

answer; /// direct cinema limits the use of narrators; ; ; and: : : : allows the audience to observe events as they occur;

answer; the smaller of the two reciprocal products of translocated chromosomes is lost; after several cell divisions, only the larger of the two translocated chromosomes remains,its reciprocal is lost;

answerjames-lange theory;