Level {{ step }} / 4

Drag to classify

Organize the students into the two-way table based on their grade and pet preference.

🐶 Dogs
🐱 Cats
Total
🎒 7th Gr.
🎓 8th Gr.
All sorted!
{{ item.r === '7th' ? '🎒' : '🎓' }} {{ item.c === 'Dog' ? '🐶' : '🐱' }}

Tap to find totals

Dogs
Cats
Total
7th Gr.
{{ data.r1c1 }}
{{ data.r1c2 }}
{{ data.r1_tot }} ?
8th Gr.
{{ data.r2c1 }}
{{ data.r2c2 }}
{{ data.r2_tot }} ?
Total
{{ data.c1_tot }} ?
...
...

Calculate missing values

Use the row and column totals to deduce the missing numbers.

Dogs
Cats
Total
7th Gr.
{{ s3Display('r1c1') }}
{{ s3Display('r1c2') }}
{{ s3Display('r1_tot') }}
8th Gr.
{{ s3Display('r2c1') }}
{{ s3Display('r2c2') }}
{{ s3Display('r2_tot') }}
Total
{{ s3Display('c1_tot') }}
{{ s3Display('c2_tot') }}
{{ s3Display('grand') }}

Build the fraction

What is the relative frequency of Dog lovers given they are in 8th Grade?

Dogs
Cats
Total
7th Gr.
{{ data.r1c1 }}
{{ data.r1c2 }}
{{ data.r1_tot }}
8th Gr.
{{ data.r2c1 }}
{{ data.r2c2 }}
{{ data.r2_tot }}
Slide to set the numerator:
(Dog lovers out of Total 8th Graders)
{{ s4Slider }}
{{ data.r2_tot }}
Correct!
🎉

You did it!

You've mastered two-way tables, finding totals, and uncovering hidden data!

{{ dragState.item.r === '7th' ? '🎒' : '🎓' }} {{ dragState.item.c === 'Dog' ? '🐶' : '🐱' }}