A 400-Student Lecture in Introductory Statistics Conducted by a Tenured

Multiple Choice

A 400-student lecture in introductory statistics conducted by a tenured professor breaks into 20 sections of 20 students for problem sessions run by helpful graduate assistants that give weekly quizzes to lighten the mood.The graduate assistants determine their section averages for their quiz each week and compare the numbers.Which of these statements is best?

A) The standard deviation of the section averages should approach the overall standard deviation.
B) A graduate assistant whose section quiz average falls outside three sigma limits should be replaced.
C) For any given week, the section averages should be normally distributed.
D) 95.5% of the section averages should fall within three standard deviations of the overall average.