Open Middle®
Directions: Using the whole numbers 0 to 20 no more than one time each, fill in the two-way frequency table so that chocolate has a higher relative frequency than vanilla and that 8th grade students has a lower frequency than 7th grade students.
Hint
What do you know about the margins of the table? What must be true about the joint frequencies?
Answer
Possible Answer:
Row 1: 13, 5, 18
Row 2: 3, 9, 12
Row 3: 16, 14
Row 1: 13, 5, 18
Row 2: 3, 9, 12
Row 3: 16, 14
Other answers are possible.
Source: Eric Zuercher
1st Row: 8, 6, 14
2nd Row: 12, 4, 16
3rd Row: 20, 10, 30
1st Row and 2nd Row are swapped
Row 1: 7, 9, 16
Row 2: 4, 10, 14
Row 3: 11, 19, 30
row 1: 7,12,19
row 2: 10,1,11
row 3: 17,13,30
The answer is
Row 1: 13, 5, 18
Row 2: 3, 9, 12
Row 3: 16, 14