One Tailed Test Diagrams
If on the other hand the null hypothesis is that mean weight of the male undergraduate students is 120 pounds and the alternative hypothesis is that can be more than 120 pounds than the one tail test will be applied and we will use the right tail for the purpose. If the other hand the hypothesis is that the weight is 120 pounds and the alternative hypothesis is that it is less than 120 pounds then again we will use the tail test and use the left tail of the normal curve.