A 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

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

Option B "biased and overstating the effectiveness of the diet"

Step-by-step 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.

the answer is a

step-by-step explanation:

because if you put 1 in to the square root of x it equals 300.

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.