The population size is 55, whereas the sample size is 48. The same sample is measured twice to determine pre and post scores. Initial plans called for a paired t-test. But we have 25 survey questions utilizing a 6-point likert scale. Another teacher told me I cant perform getting the mean on likert scales. How can I perform a t-test calculation? What are the values it requires? Please show me a solution with the same conditions as mine thanks!