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Brm (one tailed and two tailed hypothesis)


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Brm (one tailed and two tailed hypothesis)

  1. 1. BUSSINESS RESEARCH METHODOLOGY TOPIC- One Tailed & Two Tailed Test Presented By- Upama Dwivedi Section A Roll -42
  2. 2. CONTENTS  Hypothesis  Concept Of Hypothesis  One Tailed Test  Two Tailed Test  Example  Conclusion  Refrence
  3. 3. HYPOTHESIS Any assumption that the researcher makes on the probable direction of the result that might be obtained on completion of the research process is termed as a HYPOTHESIS Hypothesis testing is a process of choosing Between competing hypotheses about a probability distribution , based on observed data from the distribution.
  4. 4. Concept Of Hypothesis Null hypothesis An assertion that a parameter in a statistical model takes a particular value , and is assumed true until experiment evidence suggest . Alternative hypothesis It express the way in which the value of a parameter may deviate from that specified in a null hypothesis, and is assumed true when the experiment evidence suggests that the null hypothesis is false.
  5. 5. ONE TAILED TEST A hypothesis test in which the population parameter is known to fall either left or right of center of the sampling distribution is called one tailed test.
  6. 6. TWO TAILED TEST A statistical test in which the critical area of a distribution is two sided and tests whether a sample is either greater than or less than a certain range of values.
  7. 7. Types Of Error. The following table gives an idea about the Type I and Type II Errors. Accept HₒAccept Hₒ Reject HₒReject Hₒ H is trueₒH is trueₒ H is falseₒH is falseₒ No ErrorNo Error Type I ErrorType I Error Type II ErrorType II Error No ErrorNo Error
  8. 8. Example Of One & Two Tailed Test.
  9. 9. CONCLUSION In practice , we should use a one tailed test only when we have a good reason to expect that the difference will be in a particular direction. A two tailed test is more conservative than a one tailed test because a two- tailed test takes a more extreme test statistic to reject the null hypothesis.
  10. 10. REFERENCE • Research Methodology By-Deepak Chawla &Neena Sondhi • • • •
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