Page 92 - IM_Algebra1_FL Print Sample.pdf

neat writing
messy writing
left-handed
5
10
right-handed
34
31
1. Fill in the relative frequency table with the correct proportions so that it could be used to answer, “Among left-handed writers, what proportion have neat handwriting?”
2. Use the table to determine the percentage of right-handed writers who have messy handwriting.
Student Response
1.
2. 48%
Student Lesson Summary
Converting two-way tables to relative frequency tables can help reveal patterns in paired categorical variables. Relative frequency tables are created by dividing the value in each cell in a two-way table by the total number of responses in the entire table, or the total responses in a row or a column. Depending on what patterns are important, di erent types of relative frequency tables are used. To examine how individual combinations of the categorical variables relate to the whole group, divide each value in a two-way table by the total number of responses in the entire table to nd the relative frequency.
For example, this two-way table displays the condition of a book and its price for 120 books at a college bookstore.
neat writing
messy writing
left-handed
right-handed
neat writing
messy writing
left-handed
0.33
0.67
right-handed
0.52
0.48
Unit 3
Lesson 2: Relative Frequency Tables 25