here as nulll hypothesis is correct and we are not rejecting it , which means we are making a correct decision
P(not reject the null| null hypothesis is true) =1-P(reject null|null is true) =1-type I error =1-0.1 =0.9 ~ 90 %
Imagine that a researcher develops a new cancer drug that shrinks tumors, which she measures using...
Imagine that a researcher develops a new cancer drug that shrinks tumors, which she measures using an MRI. The researcher needs to determine if the new drug performs differently from, or the same as, the current gold-standard drug therapy which shrinks tumor diameter by an average of 0.1 mm. After performing an experiment to test the new drug on a group of 6399 cancer patients, the researcher analyzes the measurements of tumor shrinkage by using a one-sample ?z‑test for a...