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Scientific Method
The scientific method is the basis of scientific investigation. A scientist will pose a question and formulate a hypothesis as a potential explanation or answer to the question. The hypothesis will be tested through a series of experiments. The results of the experiments will either prove or disprove the hypothesis. This category should contain questions and answers regarding the scientific method.
4,392 Questions
What is a detailed explanation of how the visking model is good or bad?
can someone tell me what is good about visking tube and whats bad about it asap because i need to give my homework by tmor and my homework relates 2 that
How are the knockout mice useful in determining the function of genes?
Knock out mice are produced by impairing or deleting a particular gene expression. Thus the gene function (which was deleted) can be tracked by studying this knock out and the control mice. Lets say a gene is suspected to trigger immune response against a pathogen, one can study this by infecting the wild type(normal) and knock out(specific gene deleted) mice and study the role of the gene.
What is the difference between experiment and hypothesis?
An experiment is the thing that you perform, and a hypothesis is the guess you make at the start (before the experiment) to determin what's going to happen.
What is a variable that does not change in an experiment?
The variable that stays the same throughout the entire experiment is called the control.
Who is father of silver revolution?
Dr. Verghese Kurien is known as the "father of the white revolution" in India, which transformed the country from being a milk-deficient nation to the world's largest milk producer. However, there is no specific individual known as the father of the silver revolution.
How do you do the stepping method from kenichi?
It's a little hard to explain without showing you, but here goes:
First, point your toes together with your heels about a foot apart. Next, move your left foot backward so that it is perpendicular (makes a right angle) with your right foot.
When you're using this technique, make sure that when your toes are together, you put each foot around one of you opponents feet.
Define operational definition as distinct from lexical definition?
Operational can be defined as the process of operationalization that is used to define a variable or an object in terms of a process that is needed to determine its quantity, duration, and existence. An operational definition can, when operationalized to a greater degree, besides the procedure needed to bring something into existence.
Which term best describes the phrase something tha happens
What is the difference between an inference and a hypothesis?
A hypothesis is a theory based from observations. Hypotheses generally haven't been tested, they are merely an explanation derived from available observations.
An inference is a conclusion obtained not through observable facts, but rather through observable trends. If such and such process were to continue trending, you would make an inference about the final state of the process. As with hypotheses, inferences have generally not been tested enough to be valid.
In statistics or data management, there are two main types of variables. Each of these types of variables can then be divided into two more types of variables.
1. Categorical variable
A categorical variable is commonly known as a qualitative variable. Every response can be placed into a category. A response may fit into a specific category (mutually exclusive), or it may fit into a category such as "other" along with other responses (exhaustive). Categorical variables are either nominal or ordinal. A nominal variable is a word that describes a category (i.e. horse, dog, cat) and the order does not matter. An ordinal variable uses categories that have to be placed in an order (i.e. very bad, bad, ok, good, very good).
2. Numeric variable
A numeric variable is a variable that is expressed by a real number. It is commonly referred to as a quantitative variable. Numeric variables can either be continuous or discrete. A continuous variable is variable that can assume an infinite number of real values (i.e. 2.345....). These variables are often grouped into class intervals. A discrete variable is a variable with a finite number of real values (i.e. shoe size).
Grade 12 Data Management class
What is an operational definition?
It is a statement that describes how to measure a certain variable or how to define a certain term. The operational definition is used extensively for abstract as well as physical concepts.
An "operational definition" is a process by which the characteristics of a concept can be defined, including identification and classification. It consists of the methods or tests that are used in analyzing a given variable or concept, which can be used to confirm the validity of the information obtained.
A simple example that shows the relationship between a conceptual definition and an operational definition : if the concept is "weight", an operational definition could be "the weight of an object as measured on a scale".
An operational definition is a demonstration of a process - such as a variable, term, or object - relative in terms of the specific process or set of validation tests used to determine its presence and quantity. Properties described in this manner must be sufficiently accessible that persons other than the definer can independently measure or test for them at will. An operational definition is generally designed to model a conceptual definition. The most basic operational definition is a process for identification of an object by distinguishing it from its background of empirical experience. The binary version produces either the result that the object exists, or that it doesn't, in the experiential field to which it is applied. The classifier version results in discrimination between what is part of the object and what is not part of it. This is also discussed in terms of semantics, pattern recognition, and operational techniques, such as regression. For example, the weight of an object may be operationally defined in terms of the specific steps of putting an object on a weighing scale. The weight is whatever results from following the measurement procedure, which can in principle be repeated by anyone. It is intentionally not defined in terms of some intrinsic or private essence. The operational definition of weight is just the result of what happens when the defined procedure is followed. In other words, what's being defined is how to measure weight for any arbitrary object, and only incidentally the weight of a given object. Operational definitions are also used to define system states in terms of a specific, publicly accessible process of preparation or validation testing, which is repeatable at will. For example, 100 degrees Celsius may be crudely defined by describing the process of heating water until it is observed to boil. An item like a brick, or even a photograph of a brick, may be defined in terms of how it can be made. Likewise, iron may be defined in terms of the results of testing or measuring it in particular ways. One simple, every day illustration of an operational definition is defining a cake in terms of how it is prepared and baked (i.e., its recipe is an operational definition). Similarly, the saying, if it walks like a duck and quacks like a duck, it must be some kind of duck, may be regarded as involving a sort of measurement process or set of tests (see Duck test).
An operational definition is a definition in which something is defined by that which comprises it. For example, a pie-eating competition is operationally defined as a competition in which one eats pies. (measured in the amount of pies eaten)
What was the effect of improved methods of navigation for portuguese in the 1420?
they envented a navigation tool called the magnetic compass.
What is tallquist method testing for?
It is a method of hemoglobin estimation in blood. The process involves absorbing a drop of
blood on a standard paper and comparing it with a standard specimen.
The substance in a leaf that absorbs sunlight is called?
The substance in a leaf that absorbs sunlight is the chloroplast.Chloroplast is an organelle(a specialised structure within the cell, that performs a specific function) which contains the green pigment called chlorophyll.
Large, broad leaves
What if your demonic guardian's name is not part of the known names?
Wiccans and Witches do not believe in or worship the Devil and they do not work with demons.
In what kind of proof do you assume the opposite of what you want to prove?
This is a "proof by contradiction", where the evidence would fail to support the reverse assumption, giving credence to the original hypothesis.
What kind of questions could not be answered using scientific methods?
Why is the sky blue? Why is grass green? Questions that the world may never know are questions that could not be answered using scientific methods!
