Texas Instruments PLUS TI-89 - Manual (Page 413)

396 Chapter 23: Activities
23ACTS.DOC TI-89/TI-92 Plus: Activities (English) Susan Gullord Revised: 02/23/01 1:24 PM Printed: 02/23/01 2:20 PM Page 396 of 26
Each student is placed into one of eight categories depending on the
student’s sex and academic year (freshman, sophomore, junior, or
senior). The data (weight in pounds) and respective categories are
entered in the Data/Matrix Editor.
Table 1: Category vs. Description
Category (C2) Academic Year and Sex
1
2
3
4
5
6
7
8 Freshman boys
Freshman girls
Sophomore boys
Sophomore girls
Junior boys
Junior girls
Senior boys
Senior girls
Table 2: C1 (weight of each student in pounds) vs. C2 (category)
C1 C2 C1 C2 C1 C2 C1 C2
110
125
105
120
140
85
80
90
80
95
1
1
1
1
1
2
2
2
2
2 115
135
110
130
150
90
95
85
100
95
3
3
3
3
3
4
4
4
4
4 130
145
140
145
165
100
105
115
110
120 5
5
5
5
5
6
6
6
6
6 145
160
165
170
190
110
115
125
120
125 7
7
7
7
7
8
8
8
8
8
Studying Statistics: Filtering Data by Categories
This activity provides a statistical study of the weights of high
school students using categories to filter the data. Detailed
information about using the commands in this example can be
found in Chapter 15: Data/Matrix Editor, and Chapter 16:
Statistics and Data Plots.
Filtering Data by
Categories