This applet computes a bias corrected estimate for a standard
deviation using bootstrap samples.
How to use the applet
- Enter values for the true mean,
, and true standard
deviation,
,
into the cells at the top.
Note, these two cells act like a spreadsheet application; to
change an entry, click on it, delete the current value, type a
new one, and then press enter.
- Choose a sample size,
, from
the drop down box. Choose a sample size between 5 and 10.
- Click on the button labeled "Generate Data Sample." Next to
the button, a sample of size
from
is
generated and displayed. The sample mean,
, and sample standard
deviation,
, are
computed and displayed below the sample.
- Choose between
and
bootstrap
samples, and click "Generate Bootstrap Samples" to generate
bootstrap samples from
.
- A histogram of the sample standard deviations of the bootstrap
samples is plotted. The sample standard deviation,
, and the
sample mean of the bootstrap standard deviations,
, are
labeled on the histogram.
To view the bootstrap samples and their
standard deviations, click "View Bootstrap Samples," and a new
window will pop up.
- Below the histogram, the bias corrected estimate of
,
, is computed.
The applet