Experimental Design and Power

Replication Requirement Calculator

Estimates per-group replication for a two-mean target effect. The worked condition keeps the inputs and convention visible for checking.

Design and power inputs

Set the labeled inputs

units
units
Calculated result

Replication Requirement

Result
ceil((z+power-z)^2 × 2 × (SD/effect)^2)

    How to carry the result forward under the stated model for replication requirement

    Estimates per-group replication for a two-mean target effect. The named quantity is replication requirement calculator. This is section 1 of the replication requirement discussion.

    Save the inputs, formula convention, units, exclusions, and unrounded output with this result. This statement is conditional on the replication requirement setup and section 1.

    For replication requirement, preserve the source definition, the stated units, and the named convention beside the displayed number. A second analyst should be able to reconstruct the same result without guessing which population or setup was intended.

    The quantity this page defines when the sample changes for replication requirement

    This planning approximation assumes equal groups, known design variance, and a two-sided normal threshold. The named quantity is replication requirement calculator. This is section 2 of the replication requirement discussion.

    SD 10, effect 5, z values 1.96 and .84 require about 63 observations per group. This statement is conditional on the replication requirement setup and section 2.

    For replication requirement, preserve the denominator choice, the stated units, and the named convention beside the displayed number. A second analyst should be able to reconstruct the same result without guessing which population or setup was intended.

    A direct numerical check during an independent review for replication requirement

    This planning approximation assumes equal groups, known design variance, and a two-sided normal threshold. The named quantity is replication requirement calculator. This is section 3 of the replication requirement discussion.

    Save the inputs, formula convention, units, exclusions, and unrounded output with this result. This statement is conditional on the replication requirement setup and section 3.

    For replication requirement, preserve the comparison group, the stated units, and the named convention beside the displayed number. A second analyst should be able to reconstruct the same result without guessing which population or setup was intended.

    Interpreting the result at the chosen parameters for replication requirement

    Estimates per-group replication for a two-mean target effect. The named quantity is replication requirement calculator. This is section 4 of the replication requirement discussion.

    SD 10, effect 5, z values 1.96 and .84 require about 63 observations per group. This statement is conditional on the replication requirement setup and section 4.

    For replication requirement, preserve the time boundary, the stated units, and the named convention beside the displayed number. A second analyst should be able to reconstruct the same result without guessing which population or setup was intended.

    Keeping a reproducible record before comparing methods for replication requirement

    This planning approximation assumes equal groups, known design variance, and a two-sided normal threshold. The named quantity is replication requirement calculator. This is section 5 of the replication requirement discussion.

    Save the inputs, formula convention, units, exclusions, and unrounded output with this result. This statement is conditional on the replication requirement setup and section 5.

    For replication requirement, preserve the design boundary, the stated units, and the named convention beside the displayed number. A second analyst should be able to reconstruct the same result without guessing which population or setup was intended.

    The design boundary when the result is reused for replication requirement

    This planning approximation assumes equal groups, known design variance, and a two-sided normal threshold. The named quantity is replication requirement calculator. This is section 6 of the replication requirement discussion.

    SD 10, effect 5, z values 1.96 and .84 require about 63 observations per group. This statement is conditional on the replication requirement setup and section 6.

    For replication requirement, preserve the rounding rule, the stated units, and the named convention beside the displayed number. A second analyst should be able to reconstruct the same result without guessing which population or setup was intended.

    Questions about this calculation

    During an independent check, how many digits should be reported for replication requirement?

    Keep the inputs, units, method, exclusions, and unrounded output together. The reported quantity here is replication requirement calculator.

    Under the stated model, does this result establish a causal relationship for replication requirement?

    Keep the inputs, units, method, exclusions, and unrounded output together. The reported quantity here is replication requirement calculator.

    Before drawing a conclusion, what belongs in the saved record for replication requirement?

    Keep the inputs, units, method, exclusions, and unrounded output together. The reported quantity here is replication requirement calculator.

    For this result, what should be checked before reusing this result for replication requirement?

    Keep the inputs, units, method, exclusions, and unrounded output together. The reported quantity here is replication requirement calculator.

    During an independent check, why might another program return a different number for replication requirement?

    Keep the inputs, units, method, exclusions, and unrounded output together. The reported quantity here is replication requirement calculator.