Suppoe we wih to contruct a confidence interval for a population proportion p. If we ample without replacement from a relatively mall population of ize N, the margin of error E i modified to include the finite population correction factor a follow:
E = zα/2
Contruct a 90% confidence interval for the proportion of tudent at a chool who are left handed. The number of tudent at the chool i N = 370. In a random ample of 81 tudent, elected without replacement, there are 9 left hander