A teacher is interested in knowing the average score of his

Last updated: 7/10/2022

A teacher is interested in knowing the average score of his class. He has an idea that the mean score of his subject for the past two years has been 75. He believes that somehow the students in this batch are underperforming. What will be the null hypothesis for this claim? Mean score is 75. Mean score is more than 75. Mean score is less than 75. Mean score is different from 75.