The Sample-Size Justification Kit
Once you know which test you will run, the next question is how many participants it needs. This kit produces that number and the written case for it.
The workbook helps you choose the test. The kit sizes the study for the test you chose. About the workbook.
$12
Paid through Stripe. Files arrive at once: printable worksheets in two paper sizes plus a spreadsheet.
Inside the kit
Decide whether you need an a priori, sensitivity or compromise analysis
Find the inputs your particular test requires, from t-tests to clustered designs
Choose alpha, power and tails, including when several hypotheses are tested
Source an effect-size estimate and check it against optimistic and cautious values
Log every software setting so the calculation can be repeated
Grow the result into a recruitment target and test whether it is achievable
Draft the justification paragraph, with a page for qualitative strands too
The spreadsheet
Effect-size conversions, inflation to a recruitment target, a settings log, a feasibility check and a reporting checklist.
Low-resolution, watermarked previews.
Buying and delivery
The download link appears once payment clears and is emailed to you as well. Links last two weeks and allow ten downloads. Receipts come from GradSummit, the author's publishing imprint, which fulfils the kits. If the files will not download or open, email within two weeks for a refund. One licence per person.
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