Statistical power for a two-sample t-test
Statistical power for a two-sample t-test - sample size per group for a Cohen d, alpha and target power, or the power of a planned sample size
Answeringour last check, 2026-10-20
1 of 1checks answered this week
362 msmedian answer time
$0.01listed price per call
$0.01price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://saylorinnovations.com/api/stats/power-analysis
| Category | Everything else |
|---|---|
| Provider host | saylorinnovations.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 0 from 0 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-20 | valid payment request | 402 | $0.01 | 362 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"alpha": "0.05",
"effect_size": "0.5",
"power": "0.8"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"alpha": {
"description": "optional, default 0.05",
"type": "string"
},
"effect_size": {
"description": "Cohen d, e.g. 0.2 small, 0.5 medium, 0.8 large",
"type": "string"
},
"power": {
"description": "optional target power 0.5-0.999, default 0.8",
"type": "string"
}
},
"required": [
"effect_size"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"alpha": {
"description": "Significance level used",
"type": "number"
},
"effect_size_d": {
"description": "Effect size d",
"type": "number"
},
"effect_size_label": {
"description": "Effect size label",
"type": [
"string",
"null"
]
},
"mode": {
"description": "Mode used",
"type": "string"
},
"n_per_group": {
"description": "Number of per group",
"type": "number"
},
"note": {
"description": "Caveat or context for reading the result",
"type": "string"
},
"power": {
"description": "Target power, or the computed power when a sample size was given",
"type": "number"
},
"source": {
"description": "Data source the values come from",
"type": "string"
},
"total_n": {
"description": "Total n",
"type": "number"
},
"z_alpha": {
"description": "Z alpha",
"type": [
"number",
"null"
]
},
"z_beta": {
"description": "Z beta",
"type": [
"number",
"null"
]
}
},
"required": [
"mode",
"effect_size_d"
],
"type": "object"
},
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}