Texas Instruments TI-36X Pro User Manual - Page 42

Var Stats

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Stat %u 3 (Selects 2-Var Stats) $ $ $ < %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. Score Coefficient 1234 12 13 10 11 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 Gx given by the calculator represent? Reminder: The weighed average is Σ-----x n = (---1---2---)---(--1 1---3---)--(---0---.-5 1---0---)---(--1 1---1----)--(--0---.--5----) 1 + 0.5 + 1 + 0.5 3. The teacher gave Anthony 4 more points on test 4 due to a grading error. Find Anthony's new average grade. v v $ $ $ 42

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42
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.
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 weighed average is
3.
The teacher gave Anthony 4 more points on test 4 due to a
grading error. Find Anthony’s new average grade.
Stat
%u
3
(Selects
2-Var Stats
)
$
$
$
<
%s
%u
1
#
#
#
#
#
#
<
45
)
<
Test No.
1
2
3
4
Score
12
13
10
11
Coefficient
1
0.5
1
0.5
v
v
$
$
$
Σ
x
n
-----
12
(
)
1
()
13
(
)
0.5
(
)
10
(
)
1
()
11
(
)
0.5
(
)
+
+
+
1
0.5
1
0.5
+
+
+
--------------------------------------------------------------------------------------------------------
=