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Causal Hypotheses

Understanding causal hypotheses, from one-tail to two-tail, regarding effects of training programs on absenteeism and drug treatments on depression. Dive into null and alternative hypotheses in research studies.

warrenjsmith
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Causal Hypotheses

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  1. Causal Hypotheses

  2. Causal Hypotheses • Statement of relationship between an independent and dependent variable • Describes a cause and effect • Usually stated in two forms • The null hypothesis • The alternative hypothesis • The two forms are • Mutually exclusive • Exhaustive

  3. Causal Hypothesis (One-Tail) Causal hypothesis Employee training program will reduce employee absenteeism. There will be no change or there will be more absenteeism as a result of training. There will be less absenteeism as a result of training. Null: Alternative:

  4. Causal Hypothesis (One-Tail) Causal hypothesis Employee training program will reduce employee absenteeism. There will be no change or there will be more absenteeism as a result of training. There will be less absenteeism as a result of training. Null: Alternative: No change Less More - + 0 Absenteeism

  5. Causal Hypothesis (One-Tail) Causal hypothesis Employee training program will reduce employee absenteeism. There will be no change or there will be more absenteeism as a result of training. There will be less absenteeism as a result of training. Null: Alternative: No change A “one-tail” hypothesis Less More - + 0 Absenteeism

  6. Causal Hypothesis (Two-Tail) Causal hypothesis Our new drug treatment will cause a difference in depression. There will be no change in depression as a result of treatment. There will be a change in depression as a result of treatment. Null: Alternative:

  7. Causal Hypothesis (Two-Tail) Causal hypothesis Our new drug treatment will cause a difference in depression. There will be no change in depression as a result of treatment. There will be a change in depression as a result of treatment. Null: Alternative: No change Less More - + 0 Depression

  8. Causal Hypothesis (Two-Tail) Causal hypothesis Our new drug treatment will cause a difference in depression. There will be no change in depression as a result of treatment. There will be a change in depression as a result of treatment. Null: Alternative: No change A “two-tail” hypothesis Less More - + 0 Depression

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