The annual interest rate for Jack's savings account increased from 2.5% to 3.9%. Complete parts (a) and (b) below. a. Describe the change as an absolute change in terms of percentage points. The annual interest rate increased by nothing percentage points. (Type an integer or decimal rounded to the nearest tenth as needed.) b. Describe the change as a relative change in terms of a percentage. The annual interest rate increased by nothing%.

Studies show that massage therapy has a variety of health benefits and it is not too expensive. a sample of 12 typical one-hour massage therapy sessions showed an average charge of $58. the population standard deviation for a one-hour session is =$5.55. a. what assumptions about the population should we be willing to make if a margin of error is desired? (select your the population has uniform distribution/ the population is at least approximately normal is required/ the population has no exponential distribution/ no assumptions should be made) b. using 90% confidence, what is the margin of error (to 2 decimals) c. using 99% confidence, what is the margin of error (to 2 decimals)