1-3 4-6 7-9 10-12 13-15 16-18 19-21 22-24 25-27 28-30 31-33 34-36 37-39 40-42 43-45
Mean
X
∑ X
/ n
Median
M
50% values≥ M
50% values≤ M
Mode
Mo
Value or categorywith
largestfrequency
Note:
X1, X2, . . . . . . . Xnare data points in sample of size n
Range
R
XH- XL
Variance
S2
Standard Deviation
S
∑(xi– x)2/(n – 1)
∑(xi– x)2
n – 1
1-3
4-6
7-9
10-12
13-15
16-18
19-21
22-24
25-27
28-30
31-33
34-36
37-39
40-42
43-45
, . . . . . . . Xnare data points in sample of size n
- XL(xi– x)2/(n – 1)
(xi– x)2
![[made with GoClick]](imgs/goclick.gif)