Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar(s).
Eye Color
Hair Color Blue Gray Green Brown Marginal Total
Blond 42 5 21 10 78
Red 12 22 19 12 65
Brown 22 5 12 34 73
Black 9 3 11 64 87
Marginal Total 85 35 63 120 303

As part of a class project, a university student surveyed students in the cafeteria to look for a relationship between the students’ eye color and hair color. The table contains the survey results.

The percentage of the sample population with brown eyes and black hair is larger than the percentage of the sample population with blue eyes and black hair by
percentage points. (Round off your answer to the nearest whole number.)

Question

Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar(s).
 Eye Color 
Hair Color Blue Gray Green Brown Marginal Total
Blond 42 5 21 10 78
Red 12 22 19 12 65
Brown 22 5 12 34 73
Black 9 3 11 64 87
Marginal Total 85 35 63 120 303

As part of a class project, a university student surveyed students in the cafeteria to look for a relationship between the students’ eye color and hair color. The table contains the survey results.

The percentage of the sample population with brown eyes and black hair is larger than the percentage of the sample population with blue eyes and black hair by 
percentage points. (Round off your answer to the nearest whole number.)

Eiwoh2 · Answer

What do you think this answer would be?

Vocaloid · Answer

total = 303

to find the number of people with brown eyes + black hair look for the intersection of the brown eyes and black hair column/row

to find the number of people with blue eyes + black hair look for the intersection of the blue eyes and black hair column/row

then divide both those quantities by 303, multiply by 100 to convert to a percentage, then find the difference as indicated by the problem