91影视

The question of the survey is, 鈥淒o you support the development of atomic weapons that could kill millions of innocent people?鈥�

The number of self-participating respondents is 20.

The percentage of responses is 87% for no and 13% for yes.

The research question should be non-biased and not prompt for one type of response.

In this situation, the question prompts the respondents to select the response 鈥渘o,鈥� as it explicitly mentions the repercussions of atomic weapons but not the benefits.

The responses are collected from only 20 readers. Thus, the sample size is too small for the study.

Also, the readers choose to respond to the survey; they are not randomly selected. This comes under the method of voluntary response sampling.

Thus, the sample is not considered as an appropriate representative of the population.

Each set of 20 responses is equal to $\frac{1}{20}脳100=5\%$.

Thus, the responses are expected to be multiples of 5% (10%, 15%, 50%, etc.).

Conclusively, the four flaws are:

• The research question is biased.
• The respondents are voluntarily selected.
• The sample size is small.
• The responses obtained are incorrect.