How many tissues should the Kimberly Clark Corporation package of Kleenex contain? Researchers determined that 60 tissues is the mean number of tissues used during a cold. Suppose a random sample of 100 Kleenex users yielded the following data on the number of tissues used during a cold: x = 52, S-22. Researchers want to test if the mean number of tissues is different from 60. For a test with a level of significance of 0.1, the critical value would be, 1) 1.645 2) 1.2902 3) 1.6604 4) 1.7291