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Information given - Investigation held to find out if the Niacinamide compound reduces skin hyperpigmentation? Null hypothesis : The compound actively reduced hyperpigmentation. Alternative hypothesis

Information given -

Investigation held to find out if the Niacinamide compound reduces skin hyperpigmentation?

Null hypothesis: The compound actively reduced hyperpigmentation.

Alternative hypothesis: The compound has no effect on hyperpigmentation.

The effect size of this investigation involves the effect of Niacinamide on hyperpigmentation for the duration of 4 months. There are a series of 3 data collections done within 2 month intervals following an intervention.

QUESTIONS:

Discuss the effect size you will be investigating in this study
In this case, what does a type 1 error mean?
In this case, what does a type 2 error mean?

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