Yes, it's used to indicate possession too.
If you're referring to one client: client's contentionIf you're referring to more than one client: clients' contention
having
For any set of numbers, there can only be one mean, so it is not an issue that can arise. If you are working with more than one set of figures, then you can have more than one mean. What you do then is really dependent on what it is that you want to do with them, so there is no single answer to the question.
No. But there can be more than one data point which has the same value as the mean for the set of numbers. Or there can be none that take the mean value.
There is one arithmetic mean and one geometric mean to a set of numbers.
Yes, "statements" is the plural form of the word "statement," which refers to one assertion or declaration.
More than one.
More than one
"Ambiguous" means having double or multiple meanings, making it unclear or open to interpretation. It can also refer to something that is vague or uncertain.
Just as you have spelt it, if you mean "more than one smoker". If you mean "belonging to a smoker", it's "smoker's". If you mean "belonging to more than one smoker" it's "smokers'".
"They're" is a contraction for "they are'". They is used in the plural sense meaning more than one person. Therefore, they're can be described as more than one.
There is more than one Mecca and more than one Lahore in the world. Which ones do you mean?