Validity/Reliability (1 Viewer)

[J-Wang]

A water sample was taken and the quality of that water was to be tested. The ions present in that water were simply observed rather than recorded as to how many ppm were present. The experiment followed a strict method accurately which simply stated record the observations of the tests.
Are the results recorded (observations) valid? ie, do they accurately set out to test the quality of this water?

 

[J-Wang]

anybody? please help

 

[J-Wang]

could i say that the results obtained are valid, as they follow the method accurately, but the experimental method is invalid as it does not require the measurement of how much (ppm) of each tested ion was present?

 

[golgo13]

The experiment is valid because it followed the instructions, correctly, but not so much reliable since it was observed rather than recorded

 

[J-Wang]

The experiment is valid because it followed the instructions, correctly, but not so much reliable since it was observed rather than recorded

Could i say that the results are valid as they follow the method, but the method is invalid because it does not take recorded measurements?

 

[J-Wang]

???

 

[Spiritual Being]

I got everything in my bio half yearly 100% except for these validity and reliability questions we had. I wrote so much stuff, even the things that are mentioned in this thread and didn't get one mark. :/

 

[J-Wang]

anyone else?

 

[golgo13]

The method isn't invalid, it's just not very accurate, hence the not so reliable bit

 

[J-Wang]

cheers bro

The method isn't invalid, it's just not very accurate, hence the not so reliable bit

 

[golgo13]

Nws rep power is good lol,jks
Just if you come across it again just relate validity to if it is done correctly, reliability and accuracy are quite similar but theres some questions which might draw a definite line

 

[Manroop]

reliability s much different to accuracy. the expeirment would be reliable if you repeated it and got the same results (even if that is through observing not recording). Accuracy is how you got the measurements, i.e. observing vs recording. hope that makes sense. also an experiments can be accurate but not reliable or valid and vice versa in that relationship

 

[unLimitieDx]

I had always thought and still do that by repeating the experiment its assesses the reliability rather than improves. Improving the reliability of the experiment were things like using various water samples.

However it's clear that the syllabus want us to state that by repeating the experiment it improves reliability (since year 7 science)

 

[golgo13]

Repeating the experiment increases the consistency hence improves the reliability, but i think in his case it also relates to successfully carring out the experiment to what is specified. But i find it quite rare to talk about it, maybe in school assessments or sometimes in water or the Sulphate prac

 

[someth1ng]

A water sample was taken and the quality of that water was to be tested. The ions present in that water were simply observed rather than recorded as to how many ppm were present. The experiment followed a strict method accurately which simply stated record the observations of the tests.
Are the results recorded (observations) valid? ie, do they accurately set out to test the quality of this water?

It is valid because it does test the quality of the water in some ways.
It is not accurate since it doesn't take all factors that affect the quality of water into account.
It is not reliable since it does not state that the experiment was repeated.

 

[J-Wang]

It is valid because it does test the quality of the water in some ways.
It is not accurate since it doesn't take all factors that affect the quality of water into account.
It is not reliable since it does not state that the experiment was repeated.

If the results were repeated, gaining similar results each time, the results become reliable. but is the experimental method still unreliable because it does not take any recordings?

 

[golgo13]

If it was repeated, yes, it becomes more reliable but then they would ask if it is accurate, which it isn't