1. What is the range of the grouped data given above?

a. 5
b. 10
c. 15
d. 20

2. What is the average deviation of the grouped data given above?

a. AD = 3.33
b. AD = 3.43
c. AD = 4.33
d. AD = 4.43

3. What is the variance of the grouped data given above?

a. 20.71
b. 20.81
c. 20.91
d. 21.01

4. What is the standard deviation of the grouped data given above?

a. 4.58
b. 4.57
c. 4.56
d. 4.55

5. What is the mean of the grouped data given above (round off, whole number)?

a. 7 times
b. 8 times
c. 9 times
d. 10 times​​