Jack is a graduate student in sociology who cannot understand why the people who took his survey answered inconsistently to his questions on the reform of corrupt financial institutions. when he rephrased the questions, he received different results. jack realized he needed to worry about the of questions.

Jack realized he needed to worry about the "wording" of questions.

The selection of words and phrases in any question is basic in communicating the significance and plan of the inquiry to the respondent and guaranteeing that all respondents decipher the inquiry a similar way. Indeed, even little wording contrasts can considerably influence the appropriate responses individuals give.  

The wording of a question is very important. Researchers take a stab at objectivity in studies and, consequently, must be mindful so as not to lead the respondent into giving a coveted answer. Lamentably, the impacts of question wording are one of the minimum comprehended zones of questionnaire research.

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the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.