what can a researcher do to influence the probability of a t

what can a researcher do to influence the probability of a type 1 error? Would it effect the size of the standard error?

Solution

The significance level is the probability of a type 1 error. Thus, the researcher can manipulate/adjust the significnace level accordingly.

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No. It would not affect the size of the standard error. The standard error is dependent on the data, while the significance level is on the discretion of the researcher.