23.7 Sacred significance level. A researcher decided prior to conducting research to use a 1% level of significance. The researcher finds a P-value of 0.027. Is it okay for the researcher to change the significance level to 5% to have statistically significant results?

  1. (a) No, because the significance level is set beforehand and should not be changed after the P-value has been calculated.

  2. (b) No, because the researcher should redo the study with a larger sample size to make sure to get significant results.

  3. (c) Yes, because it is okay to change the significance level after the P-value is calculated.

  4. (d) Yes, because the researcher should have chosen the 5% level in the first place.