3 - 7, 8 - 12, 13 - 17, 18 - 22. Which of the following is/are true?
I. The class Interval is 4
II. The class boundaries are 2.5, 7.5, 12.5, 18.5, 22.5
III. The mid-marks are 5, 10, 15, and 20

Kadrijoy

3 years ago

I disagree with the answer
I think its c

Reh

3 years ago

Correct answer is c. The class boundaries are: 2.5-7.5, 7.5-12.5, 12.5-17.5, 17.5-22.5
The mid points are (7+3)/2, (8+12)/2, ... =
10/2 = 5, 20/2 = 10, ...

FAECSB7610542

1 year ago

Answer should be option C.

FAECSB7610542

1 year ago

If you check very well:

II included 18.5 in the class boundaries which is not part, so therefore II is wrong;

As for I, class interval is the same as class boundaries so I is totally wrong;

As for III, of course the mid marks are correctly written so III is correct.

From this we should be able to conclude that the answer is C (III only). Tnx.

folayan2011

10 months ago

I also disagree with the answer the answer is C

JerryQ123

3 years ago

I also disagree with this answer i think the answer is i&iii only

Chris_frosh

3 years ago

i think the answer to this is i ,ii and iii