Learn Turkish: Ankete göre müşterilerin bazıları bu tadı sevmedi. - According to the survey, some of the customers did not like this taste.

bazı müşteriler just means "some customers" in general. To say "some of the customers" (referring to a specific group), Turkish uses a genitive-possessive structure. müşterilerin means "of the customers," and bazıları means "some of them." Together, it acts like a compound meaning "the customers' some of them."

Since "some of the customers" is plural, why isn't the verb plural (sevmediler)?

In Turkish, when the subject of a sentence is a plural indefinite pronoun like bazıları (some of them), hepsi (all of them), or çoğu (most of them), the verb is usually kept in the singular third-person form (sevmedi). You could say sevmediler, but leaving off the plural suffix sounds very natural here.

Why is the word for taste spelled tadı here instead of tatı?

The root word for taste is tat. Because the customers did not like a specific thing ("this taste"), we have to add the specific direct object (accusative) suffix -ı. When we add a vowel suffix to tat, the hard t at the end softens to a d, making it tadı.

What does the -e ending in Ankete do?