An urn contains 7 red and 11 white balls. Draw one ball at random from the urn. Let X = 1 if a red ball is drawn, and let X = 0 if a white ball is drawn. Give the pmf, mean, and variance of X.

STAT 110 – Notes for Week of 9/27/16 Chapter 13 Continued o Normal curve: a symmetric bell-shaped curve. A normal curve is described by its mean and standard deviation. The mean of a normal curve identifies the center of a distribution. The mean determines the location of the curve on a graph. The standard deviation...