A researcher conducts a hypothesis test using a sample from an unknown population. If the t statistic has df = 30, how many individuals were in the sample? On = 29 Cannot be determined from the information given On= 31 On= 30 Question 15 5 pts A sample of n = 4 scores has a variance of s = 36. What is the estimated standard error for the sample mean? 16 0 3 0 4 O 2 Question 16 5 pts What is the sample variance and the estimated standard error for a sample of n = 9 scores with SS = 72? O s2 = 3 and SM = 3 O s2 = 9 and SM = 3 O s2 = 3 and SM = 1 O s2 = 9 and SM = 1