Which of these checks to see if a variable called age is equal or not equal to 16
Variable names should show what data the variable holds so others reading your code will understand it. For example, a variable holding the age of a user should be called "age" or "user_age", or something similar.
subject variable
the variable age has discriptive value but not necessarily explanatory value.
In an experiment with frogs, no, the age of the frog is not a control variable. Instead it is an independent variable,or something you change.
independent
Age can be considered an independent variable in a research study if it is being manipulated or controlled by the researcher. However, in many cases, age is treated as a confounding variable because it is often difficult to manipulate and may impact the relationship between other variables being studied.
The independent variable is the variable that the scientist controls and can change in an experiment. There should be only one independent variable in an experiment; otherwise the cause-and-effect of the independent variable cannot be determined.The dependent variable is the variable that is affected by the independent variable.EXAMPLE:Students of the same age have been given different sleeping hours (the independent variable)The next day they are tested for their performance (the dependent variable).(Having students the same age is a third type of variable, called the constant variable or the control variable. It is deliberately kept the same to reduce any effects on the outcome.)
It can be.
The dependent variable would be blood pressure. The independent variable would be age. Of course, there are many factors, other than just age, which determine blood pressure.
yes
yes
yes. usually you will work with an equal amount of dependent and independent variables. (ie, one dependent variable for every independent variable, and such that there is some kind of relationship between each..) If only. Usually a variable depends on many other variables. Such as, the price of a house depends on its size, number of rooms, distance to schools, age, windows etc.