Einfache lineare Regression erlaubt?

[RatlosigkeitinPerson]

Guten Morgen

Ich würde gerne den linearen Zusammenhang zwischen einer unabhängigen x-Variable und einer abhängigen y-Variable beschreiben. Die unabhängige Variable ist jedoch (da sie experimentell manipuliert wurde) nicht normalverteilt, sondern weist 3 Häufigkeitsgipfel auf, sodass die Datenpunkte im Streudiagramm etwa den Smileys in der unten improvisierten Skizze entsprechen

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Darf man in dieser Situation eine Regressionsanalyse durchführen? Oder welchen statistischen Test kann sonst angewendet werden?

Danke und lg

[dutchie]

hallo

darf man...
wie die UV verteilt ist spielt keine Rolle!
sinnvoll ist natürlich, dass sie so gestaltet ist,dass ein adäquater
wirkungsbereich der Variablen abgedeckt wird!
z.B. UV = Alkohol
1 Bier---2 Bier---3 Bier
-->drei Stufen der UV, sinnvoll ist nun alle drei stufen gleichhäufig zu verteilen..
und man muss sich fragen ob genug Alk am Start ist ist um die AV zu beeeinflussen!

gruß
dutchie

[RatlosigkeitinPerson]

Danke für die Antwort. Lg