Suppose we want to test Ho: u = 12.8 against H1: p

12.8 against HI: < 12.8. The sample nwan and Suppose we Wan tes sample Standard eviation are 12.1 and 3.8 respectively from a random sample of size n = 60. Assume popuiaon standard deviation is unknown. Calculate the test statisfics, [Hints: The respective test statistics for hypothesis test of population mean (p) with known population standard deviation (o) and unknown population standard deviafion are: and stat 0-18257 o -15551 0