1. X = [8, 1, 5, 8, 3, 5, 6, 7, 2, 2, 9, 9, 8]

Find the mean, median, and mode

2. A population of N = 8 scores has a mean of = 16. After one score is removed from the population, the new mean is found to be = 15. What is the value of the score that was removed? (Hint: Compare the values for X before and after the score was removed)

3 .A sample of n = 9 scores has a mean M = 13. After one score is added to the sample the mean is found to be M = 12. What is the value of the score that was added?

Example...

N = 15

= 8

One score is changed from X = 20 to X = 5...

What Is the value of the new mean?