V
2
<
2-Var Example
Data: (45,30); (55,25). Find: x
¢
(45).
Clear all data
v v $ $ $
Data
<
45
$
55
$ "
30
$
25
$
Stat
% u
3
(Selects
2-VAR STATS
)
$ $ $
StatVars
< % s
% u
1
# # # # # #
<
45
) <
³
Problem
For his last four tests, Anthony obtained the following scores. Tests 2 and 4 were given
a weight of 0.5, and tests 1 and 3 were given a weight of 1.
Test No.
1
2
3
4
Score
12
13
10
11
Weight
1
0.5
1
0.5
1. Find Anthony’s average grade (weighted average).
2. What does the value of
n
given by the calculator represent? What does the value of
G
x given by the calculator represent?
Reminder: The weighted average is
Math Functions
35
