Question

Table

Eye Color
Hair
Color Blue Gray Green Brown Marginal
Totals
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
Totals 85 35 63 120 303



As part of a class project, a university student surveyed the students in the cafeteria lunch line to look for a relationship between eye color and hair color among students. This table contains the results of the survey. From the sample population of students with blond hair, what is the relative frequency of students with green eyes?

A.0.07

B. 0.27

C. 0.33

D. 0.26

Answer 1

B. 2.7

Explanation:

You would take the number of people with blonde hair with green eyes, which is 21, and divide that by the total number of people with blonde hair, which is 78.

21 / 78 = 2.7

Answer 2

The relative frequency of students with green eyes is 63/303 = 0.21