Learn Turkish: Ankette bazı insanlar cevap vermedi. - In the survey, some people did not give an answer.

In this sentence, bazı is acting as an adjective directly describing the noun: bazı insanlar simply means "some people". You use bazıları when the word stands alone as a pronoun ("some of them"). While you could technically say insanların bazıları (some of the people), using bazı as an adjective is the most direct and common way to say "some people".

The subject is bazı insanlar (plural), so why is the verb vermedi in the singular form instead of vermediler?

In Turkish, if the third-person subject is plural and refers to humans, making the verb plural is actually optional! Because the subject insanlar already clearly shows it is plural, leaving the verb in the singular form (vermedi) is completely natural and very common in everyday Turkish.

Why does the word for survey (anket) take the suffix -te instead of -de for "in"?

This is a quick refresher on consonant mutation! Anket ends with a hard, voiceless consonant (t). When you add a suffix starting with d (like the locative case -de), that letter hardens to match it. So, -de becomes -te.

Why say cevap vermedi (did not give an answer) instead of using a single verb for "did not answer"?