(measure of central tendency)

(arithmetic mean)
(geometric mean)
(harmonic mean)
,
()
=
(mu)
1
N
(x1 + x2 + xN) =
1
N
(x1 + x2 + xn) =
1
n
N
xi
i=1
x=
(x bar)
1
n
n
xi
i=1
()
(median)

 (n+1)/2
Elementary Statistics, ISC118
Instructor:
Office:
Office Telephone
Email:
Web Address:
Book:
Office Hours:
Dr. Mehlman
305 Woodang Hall
marcmehlman@yahoo.com
math.newhaven.edu/mhm
Introduction to the Practice of Statistics , Eighth Edition
by David S. Moo