Question

What is a null and alternatives hypothesis.
Give two example each

Answer 1

A null hypothesis is a statement that assumes there is no relationship or difference between variables being tested. It represents the default or conservative position that there is no effect or association. An alternative hypothesis, on the other hand, is a statement that contradicts or proposes an alternative to the null hypothesis. It suggests that there is a relationship or difference between variables.

Example 1 - Hypothesis related to a clinical trial:
Null hypothesis: The new drug has no effect on reducing symptoms of a particular disease.
Alternative hypothesis: The new drug has a significant effect on reducing symptoms of a particular disease.

Example 2 - Hypothesis related to consumer behavior:
Null hypothesis: There is no difference in purchasing habits between men and women.
Alternative hypothesis: There is a significant difference in purchasing habits between men and women.

Example 3 - Hypothesis related to education:
Null hypothesis: The teaching method has no impact on students' test performance.
Alternative hypothesis: The teaching method significantly improves students' test performance.