Determine E(x) from the given parameters of the population and the sample size. M = 84 SD(X) = 12 n= 30 Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a 12 b 5.477 C 84 d 15.336Determine SD()'() from the given parameters of the population and the sample size. u=84 so(x)= 12 n=30 Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a 12 b 5.477 c 15.336 d 2.191 A recent study of concussions at VA Tech concluded that in a season college football players suffered an average of50 strong blows to the head with a standard deviation of 16. What is the probabilitythat a random sample of 60 college football players results in a sample mean of 48 or fewer strong blows? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a 0.1665 b 0.8335 c 0.3335 d 0.1858