Economic case study

1. Case: Statistics of Love
Three boys saw an extremely beautiful girl. After seen the girl the boys were not able to stop
themselves to propose the girl. So, the boys approached the girl and after came to her they said,”
Excuse us Miss, we would like to say something to you.”
The girl looked the boys very gently and replied, “Please, gentlemen if you have any problem?”
One of them said in a very soft and calm voice, “Miss, we want to say that after having seen you,
we have some sweet –sweet feeling in our heart for you; we think all of us are in Love with you.
Will u marry one of us?”
Now the girl who belongs to statistical background said, “Ok, gentlemen it feels very nice to hear
all these, but one thing I would like to say that can you prove it statistically? I would like to
choose the best among you.”
Now the Lips of all three boys were sealed and they thought that how could it be possible to
prove the love statistically.
They got back to their position and continuously thinking about this through the whole day but
never forget the face of the girl.
In search of solution they went to a common friend who is the student of statistics and told him
about their problem.
The friend advised them, “Ask the girl to allow you to see her continuously for ten days”.
Next day on the same place, they go to the girl and asked her the same thing.
The girl replied to the boys, “she has no problem on this but they will not try to misbehave with
her at any cost”
The boys had given promise on this.
Now the boys went to their common friend who was the student of statistics and tell him that the
girl allowed them to see her for ten days.
Now this friend advised them, “Note down your heart beat per minute daily for ten days while
seeing the girl.”
Now the data of heart beat/min of the boys after ten days was like this
Day 1 2 3 4 5 6 7 8 9 10
Boy 1 98 96 92 94 95 89 79 73 92 75
Boy 2 96 88 86 82 89 90 79 75 82 78
Boy 3 78 76 74 75 77 79 76 78 79 80
After collecting the data the boys went to their friend and show the data.
Friend calculated the averages of data of heartbeats of all three boys and finds that
Average
heartbeat/min
of all three
boys
Boy 1 Boy 2 Boy 3
88.30 84.50 77.20
Now friend said to first boy that show the data to the girl and tell her that your average heart beat
is highest among three boys so you are the perfect life partner for the girl as your heart is beating
more than other two boys
Boys went to the girl and first boy said very confidently by showing the data, “Miss, here is the
data of our heartbeats for ten days whenever we saw you our hearts were beating more than the
normal and also my average heartbeat is more than other two boys, so I am the best person to
get marry with you.”
Girl replied in the answer of the boy, “OK, Gentleman, but I would like to analyze all the data by
my own and then I will answer you that who will be best person to get marry with me. I will
answer you in next three days at three different places individually.”
Next three days would go to be very crucial to all three boys as they don’t know who will get the
opportunity to marry with the girl.
Do the statistical analysis on the behalf of that girl and conclude that the girl should marry which
boy?