Exhibit 4 A random sample of 121 bottles of cologne showed an average content of 9 ounces. It is known that the population standard deviation of the contents is 0.18 ounces. 22. Refer to Exhibit 4. The expected value of (expected mean) for the sample is 20.18 b. 9 C. 8 d. 121 23. Refer to Exhibit 4. The standard error of the mean for the sample is a. 0.5000 b. 0.1800 c. 0.0208 d. 0.0164 24. In a local university, 45% of the students live in the dormitories. A random sample of 450 selected for a particular study. The standard error of the proportion for the sample is a. 0.5408 b. 0.4500 c. 0.0235 d. 0.0389