A chemistry teacher wants to improve exam scores by incorporating more interactive in-class activities. The mean exam score for
all her previous classes is 68% with standard deviation 10%. After trying out the interactive in-class activities for her current class, this class got a score of 75%. There were 25 students in the class. She decides to calculate a 95% confidence interval for what the average exam score would be if she continued this method for all classes.
Mini conclusion: if we randomly select a sample of 25 students, there is a 95% probability that the mean score is between 64.08 and 71.92.y-step explanation:
