. Unusual For 200 births, the probability of exactly 90 girls is 0.0208 and the probability of 90 or fewer girls is 0.089. a. Is exactly 90 girls in 200 births unlikely? b. Among 200 births, is 90 girls an unusually low number of girls? Identifying Discrete and Continuous Random Variables. In Exercises 5 and 6, identify the given values as a discrete random variable, continuous random variable, or not a random variable.

ST 701 Week Four Notes MaLyn Lawhorn September 5, 2017 and September 7, 2017 Independence In words, events A and B are said to be independent if knowledge that B occurred doesn’t change our uncertainty about A. Mathematically, this can be written as if P(B) > 0, then A and B are independent events if P(AjB) = P(A). However, this deﬁnition makes it appear as if direction...