Bought How to calculate the sample size
Get help from research-coaches.com

Thank you for your purchase

You have made a wise decision.
 This will prevent you from a lot of quariling.

How large should a sample be

Check your settings

Are you able to login?


During the registration proces your account should have been upgraded. Just refresh you page.

If you did not have an account yet, an account has been created automatically based on your email address. You have to verify your account to be able to download the manual from our site.

Click on the button below to update your account.

Did you receive our email?

In case something goes wrong, you need some information to fall back on. That is why we have send you an email with basic information about the procedures.

If you don't find it in your mailbox, then check your spambox and change the setting in "this is not spam".




Download your manual from Research-Coaches.com

Can you download the manual?

If all settings are correct, you can download the manual.
Click the button below and start learning.


If you cannot get access, please send us an email (see below). There is nothing more frustrating than not getting what you have bought.

 To make sure you can download the manual, we created a link in the mail too.

In case you did not get access

The entire registration process is automated. This ensures the most secure and fastest way of going trough the process. However, sometimes it can happen that you did not get access.

A possible cause is that you've made a typing error. Sometimes this happens and it is very human. Do not worry too much about that. Also keep in mind that computer systems do not always do their job on light speed. Sometimes their reaction is delayed.

If you still do not have access after - let's say - 30 minutes, please send us an email. Then we'll try to find out where it went wrong and send you  a reply with our findings and solutions how to solve it.