Question

1. what is crucial for preventing misleading results in surveys?

a. statistical software
b. large sample sizes
c. professional interviewers
d. questionnaire design

Explanation:

A well - designed questionnaire ensures that questions are clear, unbiased, and relevant. Statistical software is a tool for analysis, large sample sizes don't guarantee non - misleading results if questions are bad, and professional interviewers can't fix poor questionnaire design.

Answer:

D. Questionnaire design