StatisticsdrillAbout Statisticsdrill
Statisticsdrill is applied statistics practice problems with instant checking. It is one of the Dravari drill sites, a family of practice tools built on the same idea: the fastest way to learn a skill you use at a keyboard is to do it, on a live tool, with instant checking, until it is a reflex.
How the exercises work
Read a real scenario: Ticket times, survey shares, conversion rates and sales data, the numbers analysts see at work. Enter one number: Use a calculator, a spreadsheet or a pencil. For tests, also choose reject or fail to reject. Learn from the check: Sample or population, one tail or two, z or t. Hints and the worked answer follow.
Every exercise is checked automatically against the expected result, not against a fixed answer string, so a correct approach passes even when it is written differently from the reference solution. If a check ever seems unfair there is a report link under it, and reports are read.
Who makes it
Statisticsdrill is made and operated by Dravari, LLC, a Delaware limited liability company based in Wilmington, Delaware, USA. The sites are built and maintained by a small team; there is no outside funding and no advertising on the practice pages. Revenue comes from Pro subscriptions, which is what keeps the free exercises free.
Contact
Questions, refunds, bug reports, company training: support@statisticsdrill.com. We answer within one working day.
The other drill sites
- Formuladrill: Excel formulas
- Shortcutdrill: Excel keyboard shortcuts
- Sheetsdrill: Google Sheets
- Pivotdrill: pivot tables
- Modeldrill: financial modeling
- Journaldrill: journal entries and accounting
- Reconciledrill: reconciliations
- Ratedrill: interest and rate math
- Querydrill: SQL
- Pandasdrill: pandas
- Scriptdrill: Google Apps Script
- Regexdrill: regular expressions