Question

In a certain industry, about 15 percent of the workers showed some signs of ill effects due to radiation. After management had claimed that improvements had been made, 140 workers were tested and 19 experienced some ill effects due to radiation. Does this results support management's claim?

Answer 1

This results do not support management's claim.

Explanation:

Before the improvements, about 15 percent of the workers showed some signs of ill effects due to radiation.

Aftter the improvements, 40 workers were tested and 19 experienced some ill effects due to radiation. 19/140 = 0.1357 = 13.57% of workers reported some ill effects from radiation. This is a very small decrease from 15%, so this results do not support management's claim.