Hypothesis

2. Hypothesis
Chapter 3
Principles of Statistical Inference
Asst Prof. Dr. Muhammad Yousaf Khan
FCPS Radiation Oncology
FRCR (UK) Clinical Oncology
SCE (UK) Oncology
PGD Oncology
CMH Rawalpindi

3. Tale of a fox with 2 tails ?

4. Agenda
I. Definition of Hypothesis
II. Type of hypotheses
III. Diference between 1-tailed versus 2 tailed hypothesis
IV. Recap

5. “Work hard, be kind, and
amazing things will happen.”
– by Conan
O’Brien

6. WhatisaHypothesis?

7. What is a Hypothesis
Testable statement Researcher's prediction
Assumption Preliminary impression
Hypothesis

8. Study: Smoking rates among males Vs females
in Islamabad

9. Hypothesis
Possible assumptions:
• Smoking rate higher i`n males than females (M > F)
• Smoking rate lower in females than males (F < M)
• Smoking rate different in males and females (F ≄ M)

10. Hypothesis
• Smoking rate higher in males than females (M > F)
• Smoking rate lower in females than males (F < M)
• Smoking rate different in males and females (F ≄ M)
• Smoking rate are equal in males and females (F = M) - Ho (Null Hypothesis)

11. Which one is a fox with 2-tails?
Possible hypotheses:
• Smoking rate higher i`n males than females (M > F)
• Smoking rate lower in females than males (F < M)
• Smoking rate different in males and females (F ≄ M)

12. Which one is a fox with 2-tails?
Possible hypotheses:
• Smoking rate higher i`n males than females (M > F)
• Smoking rate lower in females than males (F < M)
• Smoking rate different in males and females (F ≄ M)

13. Hypothesis
Possible assumptions:
• Smoking rate higher in males than females (M > F)
• Smoking rate lower in females than males (F < M)
• Smoking rate different in males and females (F ≄ M)

14. Which one is a fox with 2-tails?

15. Tale of a fox with 2 tails ? Recap

16. Thank You
Questions?
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