- One tailed test
- Greater than type
- Less than type
- Two talied test
Not equal type:
Difference between One-Tailed and Two-tailed Tests
Test statistic value does not change for two-tailed or one-tailed test.
Only the critical values/p-value associated with the test statistic changes
Example : one tailed and two-tailed
Suppose a soft-drink manufacturer's most selling product is 600ml co