Hello beautiful people, i have a couple questions for conceptual physics. I have unfortunately not been able to answer these questions. If someone could possibly answer them that would be great, and if not that perfectly fine too!

Aresearcher plans to conduct a test of hypotheses at the 1% significance level. she designs her study to have a power of 0.90 at a particular alternative value of the parameter of interest. the probability that the researcher will commit a type ii error for the particular alternative value of the parameter at which she computed the power is: a. 0.90. b. 0.01. c. 0.10. d. equal to 1

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

What type of nuclear decay causes the atomic number of an element to increase by 1?