Sample Means


Random Sampling of SAT Scores

The green dot plot above shows the SAT math scores of 1,000 students. By clicking the button, we can take a random sample of just 100 of the students, shown by the blue dots. We would like to look at the link between the parameters and the statistics. In other words, how do the sample mean () and sample standard deviation () relate to the population mean () and population standard deviation ().