Assume that your favorite statistics professor (who else, but me! ) receives an average of five e-mail messages per day from students. if the number of messages approximates a poisson distribution, what is the probability that on a randomly selected day your professor will have five messages?

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 25002500 grams and a standard deviation of 800800 grams while babies born after a gestation period of 40 weeks have a mean weight of 27002700 grams and a standard deviation of 385385 grams. if a 3232-week gestation period baby weighs 21252125 grams and a 4040-week gestation period baby weighs 23252325 grams, find the corresponding z-scores. which baby weighs lessless relative to the gestation period?

The point a is at –2 and the point b is at 7. marissa would like to divide this line segment in a 4: 3 ratio, and she would like to use the formula x = (x2 – x1) + x1. what values should she substitute into the formula? a = a + b = x1 = x2 =