Question

1. Geometric mean is greater than the arithmetic mean.

True

False

2. A college professor collected data on the number of hours spent by his 100 students over the weekend to prepare for Monday’s Business Statistics exam. He processed the data by Excel and the following incomplete output is available.

Mean	7
Sample Variance	7.84
Skewness	1.17

The coefficient of variation in the data is ______.

40%

90%

111%

243%

3. The mean grade of the 30 students in Section 1 is 80. The mean grade of the 40 students in Section 2 is 85. The mean grade of the 30 students in Section 3 is 80. What is the mean grade of all students from the three sections combined?

80.00

81.67

82.00

85.00

Answer 1