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What type of experiment is on way to test a hypothesis?
a. conclusion b.hypothesis c. data d. measurement
What make an experiment a controlled experoment?
A controlled experiment is one where two similar experiments are run in parallel, differing only in the specific intervention. A perfect controlled experiment is one where the experimenter does not know which arm is which, so is looking honestly for the outcome rather than looking for confirmation of an expected outcome. This is called blinding. In medicine, a double-blinded experiment is one where both the experimenter and the subjects are unaware of which arm they are in. Blinding is important where judgment of the outcome is subjective. An experiment on a pain drug will be highly sujective so blinding is vital; an experiment on an antibiotic may not need blinding as the results could be established by serum counts. The main function of a controlled experiment is to isolate other variables in complex systems. The most familiar kind is the standard drug trial, where a drug is compared, double-blinded, in a population which is randomised between the intervention and control arms - this is known as a randomised double-blinded controlled trial, and is required for drug approvals. The control arm may be a placebo (an inert pill), or it maybe the existing treatment. Sometimes multi-arm trials are conducted: new treatment versus current treatment and placebo. The book "Bad Science" by Ben Goldacre has an excellent overview of controlled trials ad their strengths and weaknesses.
How do scientists test hypotheses?
Scientists test hypothesis by setting up an experiment. They choose a independent and a dependent variable and test the experiment.
An example of a controlled experiment?
You will try to control many extraneous variables in any experiment. Many psychology and medical experiments will have a "Control Group" that has some kind of sham or placebo test, and an "Experimental Group" that receives the treatment you are testing. In medicine, if necessary the control group will receive the "standard of care". So, for example, if you wished to determine whether Dramamine prevented motion sickness, you could take 100 people that don't go out to sea frequently. Give half of them a dose of Dramamine, and give half of them a sugar cube (making them all believe they had the same "active" medication). Send them out deep sea fishing and observe complaints of nausea, or actual vomiting attacks. Use statistics to determine whether the sugar cube group (control group) got different results than the Dramamine group (experimental group). Control groups can be vital for analyzing epidemiological data. However, since the experimenter isn't personally manipulating the data, a lot of care must be taken to verify that a representative control group is chosen. For example, say you choose to "smoking" as your experimental variable, and you wish to study divorce rate among smokers compared to non-smokers. You could not ethically take a group of people and require half of them to smoke, and half of them not to smoke. You would have to take a group of people, some of which smoke, and some who don't smoke, and then either follow them through the future, or study historical data about them to determine trends. However, you will quickly find there are many confounding variables such as socio-economic status which could affect the observed variable (divorce rate). So, you might look at only doctors in similar health fields. Or only engineers, etc to eliminate as many confounding variables as possible.
If a scientist wanted to study how oftena plant needs water what would be the best wayto investigate it?
The best way for a scientist to investigate how often a plant needs water is to conduct an experiment. This experiment should consist of the following steps: Choose a plant species to study. Select a sample size of plants that are of similar size and health. Keep all plants in the same environment and give them the same care (i.e. sunlight nutrients etc.) Divide the plants into two groups. Give one group water every day and the other group water every other day. Observe the plants in each group over a given period of time (i.e. one month). Record any visible changes. Compare the results of the two groups. Record any differences in the health of the plants.By conducting an experiment such as this a scientist can gain insight into how often a plant needs to be watered in order to thrive. This can be useful information for anyone who is looking to grow plants in their own home or garden.
Why might scientist conduct multiple trial experiment than rely on a single trial?
Scientists might conduct multiple trial experiments rather than rely on a single trial because if there are different out comes you can choose the most common one.
What type of experiment is on way to test a hypothesis?
a. conclusion b.hypothesis c. data d. measurement
How do you choose the appropriate secondary antibody for your experiment?
To choose the appropriate secondary antibody for your experiment, consider the primary antibody used, the species it was raised in, and the detection method. Match the secondary antibody to the species of the primary antibody and ensure it is compatible with the detection method being used. Conduct a thorough literature review and consult with colleagues or antibody suppliers for recommendations.
How do you do a Solubility Experiment?
To conduct a solubility experiment, choose a solvent (e.g. water) and a solute (e.g. sugar). Gradually add solute to the solvent while stirring until no more solute dissolves. Record the amount of solute added and the final solution's appearance to determine the solubility.
What is manipulated variables in experiment about boiling point of water?
Manipulated variables are variables that a scientist deliberately adds in to tweak the outcome of his or her experiment. For instance, a scientist may choose to add certain compounds into a pot of water to see if it may affect the boiling point.
What are Variables in sceince?
There are 3 Types of Variables: Independent variables- A thing that you are going to change in the experiment, E.g the temperature of something or the brand of something. Dependent variables- The thing that you choose to observe in the experiment, E.g the amount of Volts, it is usually a measurement. Controlled variables- These are things that you are keeping the same in an experiment, E.g a brand if your comparing which brand of battery lasts longer.
Why would a scientist choose a particle accelerator over a nuclear reactor?
A particle accelerator will provide a beam of charged particles, which are accelerated by a magnetic flux, a nuclear reactor will provide a flux of neutrons (which are uncharged). Depends what sort of experiment you are doing
What are the groups in 11th Std to choose?
maths Biology is the best group,because this conduct the dr,engineer so has to choose this group
What make an experiment a controlled experoment?
A controlled experiment is one where two similar experiments are run in parallel, differing only in the specific intervention. A perfect controlled experiment is one where the experimenter does not know which arm is which, so is looking honestly for the outcome rather than looking for confirmation of an expected outcome. This is called blinding. In medicine, a double-blinded experiment is one where both the experimenter and the subjects are unaware of which arm they are in. Blinding is important where judgment of the outcome is subjective. An experiment on a pain drug will be highly sujective so blinding is vital; an experiment on an antibiotic may not need blinding as the results could be established by serum counts. The main function of a controlled experiment is to isolate other variables in complex systems. The most familiar kind is the standard drug trial, where a drug is compared, double-blinded, in a population which is randomised between the intervention and control arms - this is known as a randomised double-blinded controlled trial, and is required for drug approvals. The control arm may be a placebo (an inert pill), or it maybe the existing treatment. Sometimes multi-arm trials are conducted: new treatment versus current treatment and placebo. The book "Bad Science" by Ben Goldacre has an excellent overview of controlled trials ad their strengths and weaknesses.
How do scientists test hypotheses?
Scientists test hypothesis by setting up an experiment. They choose a independent and a dependent variable and test the experiment.
Would you choose a longer for this experiment to obtain more precise results?
No, I would just expect you to undertake the experiment with more care.
Why did the scientist choose the colour for the planet?
Scientists did not choose the color of any of the planets. They are the color they are simply because of the materials present there.
