Question

Contingency Table: Universal Health Care versus Obesity Rates over 25%

Countries in the data set	Obesity Rate 25% or Below	Obesity Rate Above 25%	Total
Universal Healthcare? No	15	5	20
Universal Healthcare? Yes	14	12	26
Total	29	17	46

DO NOT ROUND THE ANSWERS!

1. f you select a country from the data set at random, what is the probability that the country has universal health care?

2. If you select a country from the data set at random, what is the probability that the country has a rate of obesity over 25%?

3. If you select a country from the data set at random, what is the probability that the country does not have universal health care?

4. If you select a country from the data set at random, what is the probability that the country has universal health care and has a rate of obesity over 25%?

Answer 1

Answer: Contingency Table: Universal Health Care versus Obesity Rates over 25%.

Solution:

a) If you select a country from the data set at random, the probability that the country has universal health care:

P(country has universal health care) = 26/46

= 0.5652

b) If you select a country from the data set at random, the probability that the country has a rate of obesity over 25%:

P(rate of obesity over 25%) = 17/46

= 0.3696

c )If you select a country from the data set at random, the probability that the country does not have universal health care:

P(doesn't have universal health care) = 20/46

= 0.4348

d) If you select a country from the data set at random, the probability that the country has universal health care and has a rate of obesity over 25%:

P(country has universal health care and rate of obesity over 25%) = 12/46

= 0.2609