Notes from class, October 13, 2009.
Below is the probablitiy density function of the Poisson distribution with mean 17 (in blue) and the data gathered in class (in red). Each red dot represents one sample containing as many red rice grains as its x-coordinate indicates.
Below is the cumulative probability function F of the Poisson distribution with mean 17 (in blue) and the "cumulative data function" G of the data we gathered in class. (The cumulative probability function F(x) is the probability that X is less than or equal to x, where X is a Poisson random variable with mean 17. The cumulative data function G(x) is the relative frequency of the data points with value less than or equal to x.)