Hi, my name is Aditi Kolluru, and I am new to this forum. 

Quote from: Aditi on January 02, 2024, 11:58:03 PMHi, my name is Aditi Kolluru, and I am new to this forum. 

You are welcome Aditi!
Start asking your doubts in chemistry.

I also have a question, how do you see what you posted? I am not able to see the question I posted.

Quote from: Aditi on January 26, 2024, 02:29:31 AMI also have a question, how do you see what you posted? I am not able to see the question I posted.

Aditi actually you did not post your question and in fact you sent it as a personal message.
Here is your question
Question about YBTC study material
Sent to: uma on: Today at 02:25:51 AM
I have been reading the beginning of the YBTC study material. Like the parts I missed, I have been reading about CERTAINTY IN MEASUREMENT(page 9 or 10.), and it talks about how
- precision means the ability to take the same measurement and get the same result over and over. and,
•  Accuracy: refers to how close a measured value is to the true measurement (true value) of something.

It listed examples, and I understood those, like, for ex, a group of scientists recorded the number of grams that a baseball held; they recorded precision because they were recording the mass of the baseball over and over again to get the accurate answer. Which for them was 146 grams, and etc. But then, it showed pictures of like a target sign and there were red and orange lines, with 4 black dots spread around the board. There were categories like, If you are accurate and precise this is what the target looks like. I didn't really understand what the target sign meant or what it represented. I didn't understand how to know by just looking at the sign like,  oh this was accurate and precise or, that is not accurate or precise.

QuoteI didn't really understand what the target sign meant or what it represented.

Target  is the accurate value .In picture 1  all balls in the target area and close to each other.This means in an experiment readings are accurate and precise.
Picture 2 - Readings are precise (because close to each other) but not in target area means not accurate.
Picture 3 - If you take average of all readings then it is accurate but not precise (because not close to each other).
Picture 4 - Not precise  and not accurate because its not in the target.
So Target is  like accurate value.
Check example in ithe image

Quote from: uma on January 26, 2024, 06:50:08 AMAditi actually you did not post your question and in fact you sent it as a personal message.
Here is your question
Question about YBTC study material
Sent to: uma on: Today at 02:25:51 AM
I have been reading the beginning of the YBTC study material. Like the parts I missed, I have been reading about CERTAINTY IN MEASUREMENT(page 9 or 10.), and it talks about how
- precision means the ability to take the same measurement and get the same result over and over. and,
•  Accuracy: refers to how close a measured value is to the true measurement (true value) of something.

It listed examples, and I understood those, like, for ex, a group of scientists recorded the number of grams that a baseball held; they recorded precision because they were recording the mass of the baseball over and over again to get the accurate answer. Which for them was 146 grams, and etc. But then, it showed pictures of like a target sign and there were red and orange lines, with 4 black dots spread around the board. There were categories like, If you are accurate and precise this is what the target looks like. I didn't really understand what the target sign meant or what it represented. I didn't understand how to know by just looking at the sign like,  oh this was accurate and precise or, that is not accurate or precise.

Oh ok thanks. I was wondering about that.

Quote from: uma on January 26, 2024, 07:20:49 AMTarget  is the accurate value .In picture 1  all balls in the target area and close to each other.This means in an experiment readings are accurate and precise.
Picture 2 - Readings are precise (because close to each other) but not in target area means not accurate.
Picture 3 - If you take average of all readings then it is accurate but not precise (because not close to each other).
Picture 4 - Not precise  and not accurate because its not in the target.
So Target is  like accurate value.
Check example in ithe image

Thank you. I understand the target representation, and the example is clear too.