diff --git a/app/Console/Commands/SendPriceExperimentFunnelReportCommand.php b/app/Console/Commands/SendPriceExperimentFunnelReportCommand.php
index c5842838..e5ac0554 100644
--- a/app/Console/Commands/SendPriceExperimentFunnelReportCommand.php
+++ b/app/Console/Commands/SendPriceExperimentFunnelReportCommand.php
@@ -154,8 +154,8 @@ class SendPriceExperimentFunnelReportCommand extends Command
                 continue;
             }
 
-            [$low, $high2] = $this->significance->wilsonInterval($k, $n);
-            $lines[] = sprintf('  %-8s %6s  [%6s – %6s]  (n=%d)', $label, $this->percent($k / $n), $this->percent($low), $this->percent($high2), $n);
+            [$lower, $upper] = $this->significance->wilsonInterval($k, $n);
+            $lines[] = sprintf('  %-8s %6s  [%6s – %6s]  (n=%d)', $label, $this->percent($k / $n), $this->percent($lower), $this->percent($upper), $n);
             $arms[$key] = new BinomialProportion($label, $k, $n);
         }
 
@@ -171,12 +171,19 @@ class SendPriceExperimentFunnelReportCommand extends Command
         return $lines;
     }
 
+    /**
+     * @param  array<string, mixed>  $row
+     */
     private function cmMean(array $row): float
     {
         return $row['assignedMature'] > 0 ? (float) $row['contributionMarginCents'] / $row['assignedMature'] : 0.0;
     }
 
-    /** Sample variance (n−1) of per-user CM, from the accumulated moments. */
+    /**
+     * Sample variance (n−1) of per-user CM, from the accumulated moments.
+     *
+     * @param  array<string, mixed>  $row
+     */
     private function cmVariance(array $row): float
     {
         $n = (int) $row['assignedMature'];
diff --git a/app/Services/Stats/PriceExperimentFunnelCollector.php b/app/Services/Stats/PriceExperimentFunnelCollector.php
index c658c9b0..aa10547a 100644
--- a/app/Services/Stats/PriceExperimentFunnelCollector.php
+++ b/app/Services/Stats/PriceExperimentFunnelCollector.php
@@ -31,23 +31,6 @@ use Laravel\Cashier\Subscription;
  * Enable Banking actually bills us; API-key providers are free). It is symmetric
  * across arms, so it biases absolute CM but not the between-arm comparison. Make it
  * per-provider only if absolute margin ever needs to be trusted.
- *
- * @param  int  $costPerConnectionCents  flat estimated monthly cost per active connection
- * @return array{
- *     startedAt: ?CarbonImmutable,
- *     currency: string,
- *     revenueAvailable: bool,
- *     costPerConnectionCents: int,
- *     decisionWindowDays: int,
- *     variants: array<string, array{
- *         assigned: int, activated: int, subscribed: int,
- *         assignedMature: int, activatedMature: int, convertedMature: int, activeMature: int,
- *         payerCount: int, payerConnectionSum: int,
- *         conversionRate: ?float,
- *         mrrCents: int, costCents: int, contributionMarginCents: int,
- *         cmPerAssignedCents: ?int, cmSumSq: float, connectionsPerPayer: ?float,
- *     }>
- * }
  */
 class PriceExperimentFunnelCollector
 {
@@ -56,6 +39,24 @@ class PriceExperimentFunnelCollector
 
     public function __construct(private MonthlyEquivalentPrices $prices) {}
 
+    /**
+     * @param  int  $costPerConnectionCents  flat estimated monthly cost per active connection
+     * @return array{
+     *     startedAt: ?CarbonImmutable,
+     *     currency: string,
+     *     revenueAvailable: bool,
+     *     costPerConnectionCents: int,
+     *     decisionWindowDays: int,
+     *     variants: array<string, array{
+     *         assigned: int, activated: int, subscribed: int,
+     *         assignedMature: int, activatedMature: int, convertedMature: int, activeMature: int,
+     *         payerCount: int, payerConnectionSum: int,
+     *         conversionRate: ?float,
+     *         mrrCents: int, costCents: int, contributionMarginCents: int,
+     *         cmPerAssignedCents: ?int, cmSumSq: float, connectionsPerPayer: ?float,
+     *     }>
+     * }
+     */
     public function collect(int $costPerConnectionCents = 40): array
     {
         $startedValue = config('subscriptions.price_experiment.started_at');