My ping pong ball usually travels 2.75 meters when launched with a standard deviation of .15 meters. i change part of my launcher design and it now flies 3 meters on the first try. what is the probability that the new result is just random chance? (rather than because of the change i made). give your answer in %.

Unaware that 35% of the 10000 voters in his constituency support him, a politician decides to estimate his political strength. a sample of 200 voters shows that 40% support him. a. what is the population? b. what is the parameter of interest? state its value c. what is the statistics of the interest? state its value d. compare your answers in (b) and (c) is it surprising they are different? if the politician were to sample another 200 voters, which of the two numbers would most likely change? explain