Texas Instruments TI-34 - MultiView Scientific Calculator User Manual page 37

³ Problem
For her last four exams, Ada earned the following scores.
Test No.
Score
1. Find Ada's average grade on the four exams.
2. Ada found an error in the two of her test scores. Test 2 was
changed to 88 and Test 4 was changed to 84. Find Ada's
new average grade of the four exams.
3. What do you notice about Ada's average grades before the
point change and after the point change?
Clear all
data
Data
Ada's average did not change. It remained 82.5 after the
grade corrections.
1
73
v v4
73 $ 94 $ 85 $ 78 $
%t
1 $ $ <
The average grade
is 82.5.
v $ 88 $$ 84 $
%t 1
$ $ <
The new average grade
is 82.5.
2 3
94 85
4
78
37