What is the null and research hypothesis?
Olthoff (1989) tested husbands’ perceptions of the communication quality in their relationships 3 months before and again 3 months after marriage. She wanted to know if husbands’ perceptions of communication quality change during this period of time. Here are some of Olthoff’s data, with higher scores indicating better communication quality:
Ans: Null: There is no difference in husbands’ perceptions of communication quality 3 months before and 3 months after the wedding.
Research: There is a difference in husbands’ perceptions of communication quality 3 months before and 3 months after the wedding
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