Males rarely use the cubicles unless the urinal is occupied. When they do, it is mostly to take a dump. Now, in the workplace this is ever rarer, so I have decided to conduct an experiment of sorts.

In my workplace the men’s toilets has two cubicles in it, and a urinal with enough space for 1½ people. What I would like to find out is which of the two cubicles is the most popular. As there is no way to work out why a particular cubicle is popular or not, without asking everyone leaving the toilet for their thoughts, I will suggest a few reasons why I think it may be, upon the conclusion of my experiment.

Background:
There are two cubicles in the men’s toilets on my floor at work. Therefore, there are three possibilities:

1. The left-hand cubicle is visited more often than the right-hand cubicle
2. The right-hand cubicle is visited more often than the left-hand cubicle
3. Both cubicles are exactly as popular as one another.

Hypothesis:
The right-hand cubicle is more popular than the left-hand cubicle.

Method:
Without standing in the toilets (perhaps handing out towels and mints) and counting the number of visitors, I have decided upon a less accurate, but slightly more subtle approach. I will measure the diameter of the toilet roll periodically to see how much toilet-paper has been used. The frequency of the measurements should not matter, just as long as both rolls are measured at the same time. After 5 working days, the results should be clear enough for this experiment. All spare rolls in each cubicle will be measured as well before hand to ensure, should they be used, that precise measurements are available.

Control:
A third toilet roll will be used as the control. This roll will sit on a shelf outside the cubicles. This roll should not change in size as paper from it should not be used during the period of the experiment.

Data:

```     RH     LH    Cont
M   125    123    127
125    120    127
122    118    127
122    118    127
117    118    127
110    115    127
T    90    115    127
90    112    127
90    112    127
75    112    127
67    112    126
W    67    108    127
65    105    127
60    105    127
60     98    127
58     97    127
T   128     90    127
120     90    127
120     84    127
118     82    127
116     82    127
116     79    127
F   112     74    127
112     74    127
110     70    127
110     70    127
110     70    127
106     64    127```

Results:
It turns out that the right-hand cubicle is the more popular, including a toilet roll change sometime between Wednesday night and Thursday morning. The Control roll seemed to fluctuate in size late Tuesday, but this was possibly due to ambient room temperature, or due to my having to hurry measuring it because I heard someone coming into the toilet.

Conclusion:
The right-hand cubicle is the more popular as hypothesised. This is possibly due to several circumstances, none of which can be proven without further experimentation.

Possible reasons being:

• The door into the toilets swings back and obscures the right-hand toilet door, so user may feel like it is more private than the left-hand which is in full view when you walk into the room.
• The right-hand cubicle is furthest away from the hand-basins, and therefore you don’t feel like your shoes can be scrutinised under the door by people washing their hands
• People who attended the right-hand cubicle just use a lot more toilet-paper than the ones that visited the left.