Six volunteers have gone on a cholesterol-lowering diet for 3-months. The study diet is very strict: one third teaspoon of diluted oat bran is sprinkled over the subjects' cheese fondue every day. Gaunt and haggard from their ascetic experience, the subjects are recovering under the golden arches of the neighborhood dietary deprivation treatment center. You are left in the laboratory with a stale tuna sandwich and the data shown in the accompanying table Subject 1 23456 Pretrial Cholesterol level (mg/dl) 180 225 243 150 212 218 What is the standard deviation of the pretrial cholesterol? What is the standard error of the pretrial cholesterol? Posttrial Cholesterol level (mg/dl) 182 220 241 140 222 216