sample size calculation

Is there a node to calculate the sample size via parameters? E.g.
Confidence level, size of population, upper error rate (%) and expected error rate (%).

KNIME doesnt have a dedicated node for that, but you can use the Math formula node and enter the formulas for confidence interval and other metrics that you require.

Let me know if this solves your problem

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Thank you for your response—really appreciate.
Could you please explain me which formulas I can enter? Do you have an idea?

I would recommend this link that illustrates various formulas for population size estimation

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