A research team conducted a study of students' test performance. Researchers assume that individual records are normally distributed with unknown mean and variance. They collected a sample of n = 25 test scores with summaries shown below.

Sample Mean = X = 75.2 and Sample SD = S = 15

Estimate the POPULATION MEAN with confidence C = 0.95

• Show critical values needed
• Evaluate the upper and lower confidence limits. UCL = LCL =