m We want to conduct a hypothesis test of the claim that for middieaged adults the population mean of their cholesterol levels is less than 19?.6 ELE . We choose to a random sample of such levels. The sample has a mean of 196.5 E and a standard deviation of 19 Eg- For each of the following sampling scenarios, choose an appropriate test statistic for our hypothesis test on the population mean. Then calculate that statistic. Round I,l'our answers to two decimal places. [all The sample has size 100, and it is from a non-normally distributed population with a known standard deviation of 19.2. oz=D ot=D D It is unclear which test statistic to use. [M The sample has size 15.. and it is from a normally distributed population with an unknown slandard deviation. oz=] or=D C) It is unclear which test staljstic to use