In probability theory and statistics, kurtosis (from Greek: κυρτός, kyrtos or kurtos, meaning "curved, arching") is a measure of the "tailedness" of the probability distribution of a real-valued random variable. In a similar way to the concept of skewness, kurtosis is a descriptor of the shape of a probability distribution and, just as for skewness, there are different ways of quantifying it for a theoretical distribution and corresponding ways of estimating it from a sample from a population. Depending on the particular measure of kurtosis that is used, there are various interpretations of kurtosis, and of how particular measures should be interpreted; these are primarily tail weight, peakedness (width of peak), and lack of shoulders (distribution primarily peak and tails, not in between).
The standard measure of kurtosis, originating with Karl Pearson, is based on a scaled version of the fourth moment of the data or population. This number measures heavy tails, and not peakedness; hence, the "peakedness" definition is misleading. For this measure, higher kurtosis means more of the variance is the result of infrequent extreme deviations, as opposed to frequent modestly sized deviations.
Don't just close your mind
ooh ooh - criticise!
You don't realise
all you wanna do is criticise.
I just want what is right
still you say
criticise.
Can't you find something else to talk about?
Is this song the only one you sing?
Makes you look better when you put things down?
Value your opinion!
Don't criticise my friends
criticise my ideas
Don't criticise my life style
I'm fed up 'cause all you wanna do is criticise.
Don't just close your mind
ooh ooh - criticise!
You don't realise
all you wanna do is criticise.
I just want what is right
still you say
criticise.
Now can't we talk this over?
'Cause your conversation ain't right.
We can make our love stronger
you don't have to think twice.
Don't criticise my friends
criticise my ideas
Don't criticise my life style
I'm fed up 'cause all you wanna do is criticise.
Don't just close your mind
ooh ooh - criticise!
You don't realise
all you wanna do is criticise.
I just want what is right
still you say