Assignment $3$: Employee Performance Evaluation

Scenario: You are a human resources manager evaluating the performance of employees in a com$-$

pany. You want to determine if there is a significant difference in the average performance ratings

of employees before and after a training program. You collect performance ratings for a random

sample of $50$employees before and after the training.

Assignment: Perform hypothesis testing to determine if there is a significant difference in the av$-$

erage performance ratings before and after the training program. Calculate the confidence interval

for the difference in means.