Download USING THE T1-82 FOR STATISTICS

USING THE T1-82 FOR STATISTICS
sheet 1
CALCULATING MEAN, MEDIAN, QUARTILES, VARIANCE
eg: 3, 5, 6 ,1, 5, 2, 1, 2, 1, 0, 3
UNGROUPED
DATA
(single variable)
Press STAT button, then EDIT , ENTER
Enter your data into one of the lists
(L1 is the default list on this calculator)
L1
L2
L3
L4
L5
L6
3
5
6
Press STAT button, scroll across to CALC, 1-Var Stats, ENTER
1-Var Stats appears on the screen, either press ENTER again if you
have used L1 , or put in L2 etc (yellow button) after the 1-Var Stats
This gives:
x  2.636...
sample mean
 x  29
 x  115
sum of x
2
sum of x 2
Sx  1.9632... sample standard deviation
 x  1.8719... population standard deviation
n  11
minX  0
Q1  1 lower
quartile
Med  2
median
Q3  5 upper quartile
maxX  6
population
mean
FORMULA FOR CALCULATING
THE MEAN:
x
sample mean

x
x
n
n
FORMULA FOR CALCULATING STANDARD DEVIATION:

population standard deviation
sample ' standard deviation '
s
 (x  )
 (x  x )
2
n
2
n 1
(unbiased
estimate of population standard
Note: variance = (standard deviation)2
or
or
x
n
2
 2
2

n x
 2 


n 1  n

deviation)