Order #408782 Topic: A#4
© 2007 Thomson, a part of the Thomson Corporation. Thomson, the Star logo, and Atomic Dog are trademarks used herein under license. All rights reserved.
Causal Hypotheses
© 2007 Thomson, a part of the Thomson Corporation. Thomson, the Star logo, and Atomic Dog are trademarks used herein under license. All rights reserved.
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
© 2007 Thomson, a part of the Thomson Corporation. Thomson, the Star logo, and Atomic Dog are trademarks used herein under license. All rights reserved.
Causal Hypothesis (One-Tail)
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.
Causal hypothesis
Alternative:
Null:
© 2007 Thomson, a part of the Thomson Corporation. Thomson, the Star logo, and Atomic Dog are trademarks used herein under license. All rights reserved.
Causal Hypothesis (One-Tail)
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.
Causal hypothesis
Alternative:
Null:
0
+
-
No change
Less
More
Absenteeism
© 2007 Thomson, a part of the Thomson Corporation. Thomson, the Star logo, and Atomic Dog are trademarks used herein under license. All rights reserved.
Causal Hypothesis (One-Tail)
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.
Causal hypothesis
Alternative:
Null:
A “one-tail” hypothesis
0
+
-
No change
Less
More
Absenteeism
© 2007 Thomson, a part of the Thomson Corporation. Thomson, the Star logo, and Atomic Dog are trademarks used herein under license. All rights reserved.
Causal Hypothesis (Two-Tail)
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.
Causal hypothesis
Alternative:
Null:
© 2007 Thomson, a part of the Thomson Corporation. Thomson, the Star logo, and Atomic Dog are trademarks used herein under license. All rights reserved.
Causal Hypothesis (Two-Tail)
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.
Causal hypothesis
Alternative:
Null:
0
+
-
No change
Less
More
Depression
© 2007 Thomson, a part of the Thomson Corporation. Thomson, the Star logo, and Atomic Dog are trademarks used herein under license. All rights reserved.
Causal Hypothesis (Two-Tail)
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.
Causal hypothesis
Alternative:
Null:
A “two-tail” hypothesis
0
+
-
No change
Less
More
Depression