Hypothesis Testing Summarized

• Hypothesis testing deals with confidence level of the sample collected vs the population in consideration. 
• Basically, the mean calculated for a population does not necessarily match with the mean calculated for the sample. So based on this, we need to see the confidence level of the sample in regards to population.
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NOTE: Type II error occurs more in cases where multiple populations are included in the test. 

REFERENCES

https://www.greatlearning.in/great-lakes-pgpba/