The contingency table below provides frequencies for the preferred type of exercise for people under the age of 35 and those 35 years of age or older. Find the probability that an individual prefers running.
A) 0.3159
B) 0.3915
C) 0.6085
D) 0.6805

Question

The contingency table below provides frequencies for the preferred type of exercise for people under the age of 35 and those 35 years of age or older. Find the probability that an individual prefers running. 
A) 0.3159 
B) 0.3915 
C) 0.6085 
D) 0.6805

Quizplus · Accepted Answer

To find the probability that an individual prefers running, we need to add up the frequencies for running and divide by the total number of individuals surveyed. From the contingency table, we see that there are 35+41=76 individuals who prefer running out of a total of 194 individuals surveyed. 
So, the probability of an individual preferring running is (35+41)/194 = 76/194 ≈ 0.3915. 
Therefore, the best choice is B) 0.3915.

The Contingency Table Below Provides Frequencies for the Preferred Type