A weight-loss company is trying to promote its product. Based on a sample of 10 of their clients they model the relationship between starting weight and weight after 4 weeks using their product. It turns out that these 10 clients were selected because they had lost a decent amount of weight in 4 weeks. Clients who had lost hardly any weight or even gained weight were not included for this study. The results of this study, if applied to all clients, are questionable because of
A) lack of accuracy.
B) selection bias.
C) nonresponse bias.
D) response bias.

Question

Quizplus · Accepted Answer

The study's results are questionable due to selection bias, as it only includes clients who had lost a decent amount of weight, excluding those who had lost little to no weight or gained weight. This creates a biased sample that does not accurately represent the entire client population.

A Weight-Loss Company Is Trying to Promote Its Product