The plural form of the noun datum is data.
The plural possessive form is data's.
example: You must substantiate your data's reliability.
The plural of datum is data. The plural possessive is data's.E.g. The data's theft put some customer accounts at risk.
The possessive of all English plural nouns NOT ending in s is formed by adding 's: men's
The plural form of the noun month is months.The plural possessive form is months'.Example: Next month's schedule has been posted online.
The plural form of the noun address is addresses.The plural possessive form is addresses'.example: All of the addresses' accuracy has been verified.
Data's, I believe. Some argue that it is data' because data is already a plural word. My take is that the s is not added to possessives like boys' girls' or parents' because of the awkwardness of the repeated s. Since data does not end in s, the 's is ok. But try to think of another way of wording it. Use 'of the data', or something if at all possible.
Datum is not the plural of data. Datum is singular, and its plural form is data.
Datum is singular. Data or datums is plural.
The plural form for the singular noun datum is data.
The plural of datum is data. The plural possessive is data's.E.g. The data's theft put some customer accounts at risk.
Buses' is plural possesive.
Singular: hypothesis Plural: hypotheses
dictionaries'
The plural possessive of girl is girls'.
The plural possessive form of men is men's.
The noun 'datum' is a singular noun, a word for a piece of information or a basis for reasoning or a conclusion.The plural noun is 'data'.
Plural possesive.
The Peoples' court :}