Scientific method

Human Bio Exam Sem 1

Quantative Data?

Data expressed as numbers contains units and is used to avoid bias

Independent variable

investigated and deliberately changed

Human error

a mistake

random error

a change difference between the observed and true values of something. Unpredictable

Systematic error

a consistent, repeatable error in measurement that occurs due to a flaw in the measuring system or process.

Control error

does not get treated to give a comparison to experimental group which is treated

Why should hypothesis be about a single idea

To be valid and testable

Why are large number of people needed in experiment

reduce error and can increase reliability of results to allow for averaging data

Accuracy

how close a measurement it to the true value

Experimental errors

random and systematic

five principles

Voluntary, confidentiality, anonymous, no risk of harm and informed consent

Fair test

a test in which only one factor (variable) is changed and all other conditions are kept the same, has a control and experimental group.

placebo

a fake drug used in the testing of medications, Does no contain certain chemical and is given to control group in experiment

blid and double blind experients

Blind is when the patients don’t know and double blind is when the patients and doctor don’t know

data

all observations from experiment that can be analyzed and used to draw conclusions.