Is indepth analysis hyphenated

It is never one Word: there is no such English as "indepth." But you should definitely separate the Words "in depth," or more commonly, put a hyphen between them: "in-depth analysis." This is probably more correct because "in-depth" is a compound adjective (this occurs when two Words are put together with a hyphen to form an adjective; other examples are "well-deserved" and "long-awaited").