Is this a causal or an associative hypothesis?What would be the null hypothesis for this study?

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Like the same writer that is handling my Literature Review Matrix Assignment, to handle this RESEARCH HYPOTHESES Assignment!

Use one of the quantitative research articles you selected in the Literature Review Matrix Assignment, share, and critically evaluate the hypothesis in the article. Answer the following questions:
1. Is this a causal or an associative hypothesis?
2. Is the hypothesis directional or non-directional?
3. What would be the null hypothesis for this study?

CITATION should be in AMA format style. 4 sources cited and published within the last five years