و كذلك تحتاج الى عدد كبير من الاشخا

و كذلك تحتاج الى عدد كبير من الاشخاص لاتمام جمع البيانات و هذا ينتج عنه اخطاء ولأسباب عديدة اهمها الفروق الفردية بين العاملين على جمع البيانات الاحصائية.

النتائج (الإنجليزية) 1:

And you need a large number of people to complete data collection and this results in errors for several reasons the most important individual differences between working on the collection of statistical data.

النتائج (الإنجليزية) 2:

As well as the need to be a large number of people to complete the data collection, and this results in errors for many reasons the most important individual differences between workers on the statistical data collection.

النتائج (الإنجليزية) 3:

And it requires a large number of people to complete the data collection, and this results in errors for many reasons, the most important individual differences between workers on the collection of statistical data.