news release for a diet product company reports: There's good news for the 65 million Americans currently on a diet. Its study showed that people who lose weight can keep it off. The sample was 20 graduates of the company's program who endorse it in commercials. The results of the sample are probably
A. unbiased, but they could be more accurate. A larger sample size should be used.
B. biased, overstating the effectiveness of the diet.
C. biased, understating the effectiveness of the diet.
D. None of the above
Answer:
Option B "biased and overstating the effectiveness of the diet"
Explanation:
It is evident that there is sampling/volunteer biased in the data report because the sample for endorsement of diet is not random because all the people that endorsed it in the commercial have a tie with the company so it is a mis representation of the population.