3 and 4 are correct.
1 and 2 are not.
#1. First I don't know what the balance at the far side of the room is; however, that is beside the point. It is NEVER acceptable to write a number anywhere except in your lab manual. After writing it in your lab manual you may then copy that to any other location but the initial measurement is supposed to go in the lab manual.
#2. This question is a mixed bag because it's a little confusing. Your statement about how the number of s.f. ALLOWED is determined is correct. I assume the question is talking about the NUMBERS you get from the instruments (although the problem says instruments and not numbers and that is the confusing part to me); i.e., the measurements. In that sense the instrumentation does determine the number of s.f. because that's where the numbers comes from. For example, if I am using an analytical balance, the fact that it can weigh to the nearest 0.1 mg tells me how many s.f. I will get from that measurement. Then I use a pipet which also has a certain accuracy. Together, those measurements then determine the number of s.f. allowed in the answer by the procedure you described.
Am i correct for the following?
1. "quick data" such as that of a mass measurement on a balance located at the far side of the lab, can be recorded on a paper scrap and then transferred to the report sheet at your lab station. TRUE?
2. the lab instrumentation determines the number of significant figures when recording quantitative data? FALSE-- isn't the number of digits the smallest number being multiplied determine the number of sign. figures?
3. for scientific data only one data pt. is necessary to calculate its standard deviation.---FALSE--dont you need 2?
4. for determining the relative deviation in the analysis of a data set, the standard deviation and the average of the data ,must be determined--TRUE?
I was given a huge list of True False questions, and these struck my attention, but I think i am correct?
thank you very much! you have been so helpful!
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