Plan Before You Field

Use these transparent planning checks to scope a study. Confirm consequential designs with a methodologist or study-specific power analysis.

A/B Sample Size

Plan a two-group conversion test

Approximate respondents needed in each group using a two-sided comparison of proportions.

Baseline conversion

Minimum lift

points

Confidence

Power

1,775people per group, about 3,550 total

Conversion Lift

See the practical size of an observed rate difference.

Visitors

Baseline rate

Observed rate

+30estimated conversions across 1,000 visitors

Conjoint Planning Check

A common rule-of-thumb screen, not a study-specific power analysis.

Respondents

Tasks each

Profiles per task

Most levels in an attribute

4,800profile observations; rule-of-thumb minimum sample 125

Software Cost

Compare software prices only; respondent recruitment is separate.

Annual subscription

Years

$1,100difference versus a $100 One-Time Payment over 2 year(s)