Final answer:
A leading question is not part of a scientific poll design because it can introduce bias, while a random sample is essential. A fire station is not suitable for democratic leadership due to the need for quick, decisive action in emergencies.
Step-by-step explanation:
The question "Which of the following is not part of a scientific poll design?" is related to understanding how scientific polling works. A leading question is indeed something you want to avoid in a scientific poll as it can bias the results. However, a random sample is essential for a scientific poll because it helps to ensure that every individual within the target population has an equal chance of being selected, which is crucial for the poll results to be representative of the general population.
Similarly, the question "Which of the following is not an appropriate group for democratic leadership?" tackles the suitability of this leadership style in different organizational contexts. A fire station is generally not an appropriate group for democratic leadership because of the need for quick decision-making and clear command structure in emergency situations where lives could be at stake.