Catheters, again the catheter company in exercise 40 is reviewing its testing procedure.
a) suppose the significance level is changed to a = 0.01. will the probability of a type ii error increase, decrease, or remain the same?
b) what is meant by the power of the test the company conducts?
c) suppose the manufacturing process is slipping out of proper adjustment. as the actual mean diameter of the catheters produced gets farther and farther above the desired 2.00 mm, will the power of the quality control test increase, decrease, or remain the same?
d) what could they do to improve the power of the test?

If your score on your next statistics test is converted to a z score, which of these z scores would you prefer: minus2.00, minus1.00, 0, 1.00, 2.00? why? a. the z score of 2.00 is most preferable because it is 2.00 standard deviations above the mean and would correspond to the highest of the five different possible test scores. b. the z score of 0 is most preferable because it corresponds to a test score equal to the mean. c. the z score of minus2.00 is most preferable because it is 2.00 standard deviations below the mean and would correspond to the highest of the five different possible test scores. d. the z score of minus1.00 is most preferable because it is 1.00 standard deviation below the mean and would correspond to an above average