Q: Is age a continuous variable

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yes

No It's continuous variable a that also falls under the category of 'ratio level of measurement'

It is a continuous variable.

It depends how we have computed %age. By and large, percentage is a summary statistic. Its a categorical variable (may be nominal or ordinal). That way its a discrete. In case of assay or yield computations it becomes a continuous variable. Naresh K Chawla nkchawla@gmail.com

No, it is a continuous variable.

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yes

No It's continuous variable a that also falls under the category of 'ratio level of measurement'

It is a continuous variable.

It is a continuous variable.

It is a continuous variable.

Yes. It is a continuous variable. As used in probability theory, it is an example of a continuous random variable.

No, Patient's gender is not a continuous variable. It is discrete variable.

No, it is a continuous process but not a continuous variable. The magnitude of star-shine, across all stars is a continuous variable. The magnitude of a star's shine over time is a continuous variable.

ocean depth is a continuous or discrete variable?

Not continuous => Discrete variable. Continuous => Continuous variable.

It depends how we have computed %age. By and large, percentage is a summary statistic. Its a categorical variable (may be nominal or ordinal). That way its a discrete. In case of assay or yield computations it becomes a continuous variable. Naresh K Chawla nkchawla@gmail.com

Both. It is correct to consider age as a continuous variable, but we collect data on people's ages as if they were discrete variables. Age is generally given in years, at least in humans. When we round off our numbers, we make age a discrete variable. We say a person turns 21 as if one day he's 20 years old and the next day he's 21 years old. This is the way we treat age as a discrete variable. If we considered age as a continuous variable, we would say he is 20.99 years old a day before his birthday and exactly 21 years old only on his birthday, on the exact time of his birth. After that he is 21.001 years old.