The population arithmetic mean, " , is computed The sample arithmetic mean, * , 15 computed by using using all of the individuals in a population. The some of the individuals in a population. The sample mean population mean is a parameter. is a statistic. x +x_+ ... +x X x +x+...+x X N = 1 = N N Ex: Of the 42 students enrolled in an Introductory Statistics course, the data below Student Score are the first 10 exam scores. Treat the 10 students as a of Michelle 82 the population, which means you use to find the mean. Ryanne 77 Bilal 90 Pam 71