In a valid experiment all the variables are kept the same apart from those being investigated.
Sorry but your question doesn't make sense... You have to know what the hypothesis is to test if your question is valid.
A reliable measure is consistent and yields consistent results, so it may not be measuring the intended construct accurately (lack validity). On the other hand, a valid measure accurately assesses the intended construct, but it must be consistent and produce stable results (reliable) to ensure that the measurements are dependable and trustworthy.
To ensure that the results are valid. That's the whole point of a science test. The test must be able to be repeated and have the same result to start being considered valid.
In my view reliable test is always valid.
So it becomes a fair test and you can make sure you didn't make any mistakes :)
There is no such valid test, so I would definitely question it.
No
Yes, it would be a valid test.
No
No, for a test to be valid, it must also be reliable. Reliability refers to the consistency of the test results, while validity refers to the accuracy of the test in measuring what it is supposed to measure. A test cannot be valid if it is not reliable.
Yes sure. It is valid. It will shows the how fast you are thinking.
Yes. The car dealer is responsible for insurance when cars are test driven. They only need to make certain the potential driver has a valid license.