An investigator conducts an experiment the significance level for each of these

Question

An investigator conducts an experiment the significance level for each of these two-sample t-Hests have to be lower? with four treatment groups. The response variable is growth of a plant during the experiment. She perfoms two-sample s-tests to compare two treatment group means at t ime Why would Choose the correct answer below O A. To keqp the probably of making at leas one Type lEmor no highar than a presdetermined signiticnce l O B. To keep the probability of making a Type I Eor on each of the two-sample t tests no higher than a presetermined signicance level C. To keep the probablity of making a Type ll Error on any of the two-sample t ests no higher than a predetermined signilicance leve O D. To provide better estimates of the treatment group means E. To make it harder to reject the null hypothesis aswe want to be sure that No teatment pop, hare diferent means

Explanation / Answer

The significance level for each of these two sample t test have to be lower becaus,

To keep probability of making type 1 error on each of the two sample t test no higher than a predefined significane level.

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