No. It can be but need not be. For example, you might calculate the ratio of today's temperature in Celsius and in Fahrenheit and calculate the ratio. That is not a rate.
They are always true - if your calculations are sound.
The selectivity ratio is a measure used to evaluate the effectiveness of a test or screening tool in distinguishing between different populations, typically in the context of medical diagnostics or research. It is calculated by comparing the true positive rate (sensitivity) to the false positive rate. A higher selectivity ratio indicates that the test is better at correctly identifying individuals with the condition while minimizing false positives. This ratio helps in assessing the reliability and accuracy of diagnostic methods.
no it is not always true
always. if two lines intersect, then exactly one plane contains the lines.
No. It can be but need not be. For example, you might calculate the ratio of today's temperature in Celsius and in Fahrenheit and calculate the ratio. That is not a rate.
real number
Statements that always or never hold true are called "tautologies."
False..Sometimes
Yes.
They are always true - if your calculations are sound.
always true
True.
True
It is always true.
No, it's not true. Terrorism is a strategy, not a goal.
sometime true