Sample Planning Wizard: Description
Whether you are a novice researcher or a world-class statistician, the Sample Planning Wizard
can help you identify the right sampling plan for your research.
What the Wizard Does
The Sample Planning Wizard allows you to
easily assess how different design decisions (sample size, sampling method,
etc.) affect the precision and cost of your research. For example, you can
quickly find the design that:
- Achieves a specified sampling error for the smallest cost.
If you are conducting a hypotheis test, the Wizard can assess the statistical power
associated with your design.
- Or you specify power, and the Wizard calculates effect size.
And the Wizard even works with small samples.
- With proportions, the Wizard uses a binomial distribution for small samples when sampling with replacement;
and a hypergeometric distribution when sampling without replacement.
How the Wizard Works
The Sample Planning Wizard makes it easy to create powerful, cost-effective sampling plans.
- A final report, written in plain English, appears in seconds. The report
documents key elements of your plan (sampling method, sample size, cost of implementation, etc.),
describes the methodology used to compute statistical properties (margin of error, confidence interval,
power of statistical tests, etc.) associated with your plan, and offers suggestions for improvement.
The Wizard defines terms and provides user-friendly Help screens at each stage of the analysis.
How to Access the Wizard
The Sample Planning Wizard is available only to registered users. Before you register, though,
you may want to play with a demo version of the Wizard. The demo is free, and it will allow you to quickly
determine whether the Wizard is right for you.
If you like the demo, register to use the full Wizard. A one-month license costs
$10. And satisfaction is guaranteed. If you are dissatisfied, just
contact us within 30 days; and we will issue a full refund.
Once you have registered, you can access the Wizard from the Stat Tools tab,
which appears in the header of every Stat Trek web page. Just click the Wizard link under the tab.
Or you click the button below.