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Act IV: HPDA Scientific Research - Coggle Diagram
Act IV: HPDA Scientific Research
Accuracy
Accuracy refers to how close a measurement is to the true or accepted value
Precision
Precision refers to how close measurements of the same item are to each other; it is independent from accuracy
Error/Uncertainty
The uncertainty tells us how closely a second measurement is expected to agree with the first. Errors can arise in several ways, and the uncertainty should help us quantify these errors. "In a way the uncertainty provides a convenient ‘yardstick’ we may use to estimate the error"
percentage of uncertainty
Variables
Independent Variable
the variable that is altered during a scientific experiment
Dependent Variable
the variable being tested or measured during a scientific experiment (the measured variable)
Controlled Variable
a variable that is kept the same during a scientific experiment
Relationships between variables
Linear
A linear relationship (or linear association) is a statistical term used to describe a straight-line relationship between two variables. It can be expressed either in a graphical format or as a mathematical equation (y = mx + b)
Quadratic
A quadratic relationship is a mathematical relation between two variables, the equation holds our two variables and forms a parabola
Inverse
In an inverse relationship, instead of the 2 variables moving in the same direction they move in opposite directions, meaning as one variable increases the other decreases (A.K.A negative correlation)
Exponential
Exponential relationships are relationships where one of the variables is an exponent. So instead of it being '2 multiplied by x', an exponential relationship might have '2 raised to the power x' (usually used with growth factors)
