Suppose that for a randomly selected high school student who has taken a college entrance exam, the probability of scoring above 650 is 0.30. A random sample of n = 9 students was selected. To find the standard deviation o of X, the number of students in the sample who have scores above 650 we would use 9(0.3) (x) Fill in the value for x. 6 = jnp(1-p)