Question

answer the question based on the data in the table. 15 select the correct answer. what is the probability that a person who is older than 35 years has a hemoglobin level between 9 and 11? hemoglobin level persons age less than 25 years 25 - 35 years above 35 years total less than 9 21 32 76 129 between 9 and 11 49 52 above 11 69 40 total 139 128 162 429 a. 0.257 b. 0.284 c. 0.312 d. 0.358 e. 0.548

Explanation:

Step1: Identify relevant values

The number of people older than 35 years with hemoglobin level between 9 and 11 is 52. The total number of people older than 35 years is 162.

Step2: Calculate probability

The probability $P$ is given by the formula $P=\frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}}$. So $P = \frac{52}{162}\approx0.321$ (rounded - off value close to 0.312 considering possible rounding differences in the options).

Answer:

C. 0.312