1. In GEC 14 class, a student's quiz scores are 95, 89, 98, and 88. What score does the student need in the fifth quiz to have a mean quiz score of 83 given that all the quizzes have equal weights? *

a. 61

b. 83

c. 45

d. 52

2. The following daily temperatures were recorded as follows: *

54, 68, 61, 69, 71, 67, 62, 65, 60

Find the mean, the median and the mode of the given data.

a. Mean:63.8, Median:65, Mode:65

b. Mean:63.3, Median:65, Mode:67

c. Mean:64.1, Median:65, Mode:None

d. Mean:63.8, Median:71, Mode:65

3. The ages of a sample of 16 employees at CMU were found to be 22, 58, 25, 35, 35, 40, 40, 35, 43, 53, 47, 22, 53, 35, 58, and 25. Find the variance of the ages of the 16 employees. *

a. 148.65

b. 149.66

c. 166.65

d. 139.36

4. The ages of a sample of 16 employees at CMU were found to be 22, 58, 25, 35, 35, 40, 40, 35, 43, 53, 47, 22, 53, 35, 58, and 25. Find the standard deviation of the ages of the 16 employees. *

a. 12.19

b. 11.81

c. 12.91

d. 12.23

5. Given the sample data: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50 and 55. If every observation is multiplied by 2, what is the new standard deviation? *

a. 49.75

b. 16.58

c. 33.17

d. 66.33