Question

Stephanie is designing an experiment to investigate the effect of listening to calming music on positive emotions. Even though the usual alpha level is 0.05, Stephanie feels that she wants to adopt more stringent criteria for her study, so she chooses an alpha level of 0.01. This strategy reduces the probability of:

A. Type I error

B. Type II error

C. p -value error

Answer 1

Alpha level 0.01 test reduces the probability of "false positivity", where the null hypothesis is rejected even though it was true because the significant result between tested variables was due to mere chance than significant causal relationship. This type of error is called Type I error.

Answer. Type l error.