Uniform distributions
Generate random data distributions
Generate a UNIFORM distribution of 100 whole numbers from 1 to 100.
uniform distribution: each number in the range is equally likely to occur.
Copy and paste it to
freq dist, histogram, stats ***
n=____ mean=______ SD s=________ range/sqrt(12)=________
Is each quartile of the boxplot the same length:______ (may or may not be...)
Make a histogram with class width 1.
How many times, on average, will each number (1-100) be in the data set
given that each number has the same chance as every other of being here:___
What's the minimum frequency (count) of this data:___
Any numbers in the range 1-100 not generated?:_____ How many?:_____
What's the maximum frequency (count) of this data:___
i.e. there is variation. Some numbers will occure more than expected, others less.
Generate and Copy and paste a uniform distribution of 1000 whole numbers from 1 to 100.
n=_____ mean=______ SD s=________ range/sqrt(12)=________
basically the same values as before.
Is each quartile of the boxplot the same length:______ (now we're cookin')
Make a histogram with class width 1.
How many times will each number (1-100) on average be in the data set:___
What's the minimum frequency (count) of this data:___
Any numbers in the range 1-100 not generated?:_____ very unlikely
What's the maximum frequency (count) of this data:___
What is the ratio of the maximum frequency to the minimum frequency:______
This up and down is the randomness to expect of a uniform distribution.
If the bars are all the same height then your spidey senses should be
tingling that something "special" is happening.
or n is very large. As n gets larger, the histogram gets "flatter".
2s=_____
What are the "statistically significant" bounds: <mean-2s:_____ >mean+2s:_____
How many datums are "statistically significant" i.e. more than 2 SD from the mean:____
"Trick question" because in a uniform distribution ALL the data is within 2 SD of the mean!
Since you're here...
Generate 100000 uniformly distributed whole numbers from 1 to 100.
Copy, paste, button.
Look at the flattening "stickgram". Make a histogram with class width 1.
What's the minimum frequency (count) of this data:___
All numbers in the range 1-100 are generated.
What's the maximum frequency (count) of this data:___
What is the ratio of the maximum freq to the min frequency:______
How does this ratio for this data compare to the ratio of the above 1000 numbers:
________________________________