Histogram data

We  create the data first by using the Table function
We fill the Table with Random Numbers attach it to the 
variable data
Alternatively we could read in data from a file with
measurements in it.

data=Table[50+RandomReal[{-5,5}],{n,2000}]

Try to suppress the output on the screen

We can  obtain the Statistical Properties of the data
array, like mean or standard deviation

Mean[data]

StandardDeviation[data]

10./Sqrt[12]

We can also plot the data using the histogram feature

Histogram[data]

Measured data always have measurement errors
They follow often a normal distrution

We create a normal distribution with a certain width 
around an average value

normdata=RandomArray[NormalDistribution[50,2.8],10000];

Histogram[normdata]

Histogram[RandomReal[NormalDistribution[50,2.8`],10000]]

Mean[normdata]

Mean[RandomReal[NormalDistribution[50,2.8`],10000]]

StandardDeviation[normdata]