A sample of 500 people aged 30 - 40 years old were interviewed to study the relationship between whether a person graduated from college or only high school and whether s/he changed jobs in the last 5 years.The results are found in the contingency table below.
Answers below have been rounded to two decimal places.
What is the probability that an individual has changed jobs?

Question

A sample of 500 people aged 30 - 40 years old were interviewed to study the relationship between whether a person graduated from college or only high school and whether s/he changed jobs in the last 5 years.The results are found in the contingency table below. 
Answers below have been rounded to two decimal places.
What is the probability that an individual has changed jobs?

Quizplus · Accepted Answer

The probability of an individual changing jobs can be calculated by adding up the frequencies of those who changed jobs and dividing by the total sample size. (110+145)/500 = 0.49 or 49%. Therefore, choice B is the correct answer.

A Sample of 500 People Aged 30 - 40 Years