Alternative Hypothesis

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Definition: Alternative Hypothesis

In statistics, alternative hypothesis is stated as an alternative to the null hypothesis. The null hypothesis is then tested using one of the many statistical hypothesis tests.

For e.g. In order to determine whether the humidity in Mumbai is in the same range as that of Pune, the null hypothesis could be the humidity levels in the two cities are same. Alternative hypothesis could be that the humidity levels in the two cities are not the same.

The alternative hypothesis could be:

  1. Point Hypothesis: When the alternative hypothesis points at one particular value
  2. One-tailed directional: when the region of rejection lies on only one side of the distribution
  3. Two-tailed directional: When the region of rejection lies on both sides of the distribution
  4. Non-directional: It is not concerned with any direction but only with the rejection of the null hypothesis

If the null hypothesis is not true, it does not mean that the alternate hypothesis is definitely true. It merely indicates a possibility given the possible range of error that the alternative hypothesis may hold true.

Hence, this concludes the definition of Alternative Hypothesis along with its overview.

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