Hypothesis YouTube Lecture Handouts for Competitive Exams

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Watch video lecture on YouTube: Hypothesis Testing in Research Methodology: 2 Errors (Alpha & Beta); p-Region Hypothesis Testing in Research Methodology: 2 Errors (Alpha & Beta); P-Region
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Hypothesis – Research

Insufficient Evidence Can be true or false

Concept

  • Tentative solution to a problem

  • May or may not be correct

  • Clear

  • Precise

  • Testable

  • Consistent with facts

  • Provide answer to problem

  • Logical simplicity

  • Not contradict established facts

Image of Hypothesis - Research

Image of Hypothesis - Research

Image of Hypothesis - Research

Why Important?

  • Direction to research

  • Operationalize procedure

  • Select facts

  • Replicate research

  • Draw logical conclusion

  • Relation between variables

  • Provides a statement deduced from theory

Aims to Find?

  • Difference

  • Relationship (Statistically significant – Implies difference in result did not occur by chance)

  • Interaction

Null Versus Alternative Hypothesis

Null Versus Alternative Hypothesisi For Hypothesis Image- 2

Null Versus Alternative Hypothesisi for Hypothesis Image - 1

Null Versus Alternative Hypothesisi For Hypothesis Image- 2

Measuring Temperature for Hypothesis Testing

Measuring Temperature for Hypothesis Testing

Measuring Temperature for Hypothesis Testing

Null Hypothesis (H0)

  • No statistical significance between the two variables.

  • Researcher is trying to disprove it.

  • Individual is free from disease

  • Relationship is due to chance

Alternative Hypothesis (Ha)

  • Statistical significance between the two variables.

  • Researcher is trying to approve it

  • Individual has disease

  • Relationship is not due to chance

  • If is accepted, is rejected

Substantive vs. Statistical

  • Substantive – expected relation b/w variables, not operationalized

  • Statistical – operationalized in terms of statistical parameter

Simple vs. Complex

  • Simple – 1 IV & 1 DV

  • Complex – 2 or more IV & 2 or more DV

Practical vs. Statistical

  • Practical – In terms of practical outcomes

  • Statistical – In statistical outcomes

Positive, Negative or Null

  • Null – no relation b/w IV & DV

  • Positive

  • Negative

Universal vs. Existential

  • Universal – all variables are true at all times

    “Brave soldiers if rewarded will perform well”

  • Existential – exist atleast for one particular case

    “Few corporate staff might not perform well despite reward”