Central Tendency Test

Select your answers to the following 5 questions from the pop-up menus in the right hand column. Clicking the "Begin Test Again" button will clear all the answers.

 

 

Q1:

Find the mean of the following data:

4, 5, 123, 4, 7

 A. 4
B. 5 
C. 28.6
D. 116

Answer 1:

Q2:

In question 1, which of the following would be the most appropriate "average"?

 A. mean
B. median
C. mode
D. standard deviation

Answer 2:

Q3:

Find the mean of the following frequency distribution:

x
3
4
5
6
7
f
2
3
4
5
1

 

 A. 4
B. 4.5
C. 5
D. 5.5

Answer 3:

Q4:

The table shows the lengths of a sample of leaves collected from a tree.

Length (cm)
Frequency
0 -
2
1 -
3
2 -
6
3 -
4
4 - 5
2

Find the mean, to 1 d.p., of this distribution. (clue: use mid-points of each interval)

 

 A. 2.4
B. 2.5
C. 2.6
D. 2.7

Answer 4:

Q5:

In the above table find the modal interval for the lengths of leaves.

 A.1 - 2 
B. 0 - 5
C. 3 - 4
D. 2 - 3

Answer 5: