I do not believe that any of those calculations are based on the pdf,
frequency of occurrencehistogram. This, (1, 2,2, 4, 2,5,4) and not this
(1,3, 0,2,1). The latter are the frequencies of occurrence for 1,2,3,4,5.
John Hunter wrote:
> On Tue, Dec 1, 2009 at 6:32 AM, Wayne Watson
> <sierra_mtnview@...> wrote:
>
>> Is there some statistics function that computes the mean, std. dev., min/max, etc. from a frequency distribution?
>>
>
> numpy has many functions for basic descriptive statistics. If "data"
> is an array of your data, you can do (import numpy as np)
>
> mean: np.mean(data)
> median: np.median(data)
> standard deviation: np.std(data)
> min: np.min(data)
> max: np.max(data)
>
> In scipy.stats, there are many more (skew, kurtosis, etc...) See
> also, this example:
>
>
> http://matplotlib.svn.sourceforge.net/viewvc/matplotlib/trunk/py4science/examples/stats_descriptives.py?view=markup&pathrev=4027
>
> JDH
>
>

Wayne Watson (Watson Adventures, Prop., Nevada City, CA)
(121.015 Deg. W, 39.262 Deg. N) GMT8 hr std. time)
Obz Site: 39° 15' 7" N, 121° 2' 32" W, 2700 feet
The popular press and many authorities believe the number
of pedofiles that prowl the web is 50,00. There are no
figures that support this. The number of children below
18 years of age kidnapped by strangers is 1 in 600,000,
or 115 per year.  The Science of Fear by D. Gardner
Web Page: <www.speckledwithstars.net/>
