Hi, there is three questions. Please I want them to be correct 100%. Be careful when you round the first question. Please again, I want the correct answers. Thanks!

+/ ) 100% Normal text Arial 12 + BIUA A random sample of size n is required to produce a margin of error of + E. By what percent does the sample size need to increase to reduce the margin of error to + - E? Round your answer to the nearest percent. about % A researcher provides nutritional supplements to athletes and measures any increase in their performance. Identify the method of data collection this situation describes. This situation is a(n) experiment observational study survey simulation To test the effectiveness of a new fitness program, 220 people in an exercise class were randomly divided into two groups. One group was assigned to the new fitness program and the other group continued with the regular fitness program. In four weeks the group using the new program showed a 15% increase in muscle strength, while the group who continued with their regular routine showed a 5% increase in muscle strength. Identify the treatment group and the control group. 1. Athletes using the regular fitness program 2. Athletes using the new fitness program #:Treatment Group :Control Group search O S 71.F Clear