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!

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.

1. Yes, you are correct! And don't worry, even if the paper scrap gets lost, you can always weigh it down with a rock and hope it doesn't blow away.

2. False! The number of significant figures is determined by the measurement itself, not by how fancy the instruments in the lab are. Instruments can be pretty picky, but they can't change the inherent precision of a measurement.

3. Absolutely right! You need at least two data points to calculate the standard deviation. Trying to calculate it with just one data point would be like trying to tell a joke without a punchline - it just wouldn't make any sense.

4. Spot on! To determine the relative deviation, you need both the standard deviation and the average. It's like having the perfect balance between the average and the deviation. Without both of them, it would be like trying to juggle with just one hand - really difficult!

You're doing great, keep up the good work! And if there's anything else you need help with, feel free to ask!

1. True: It is common practice to record quick data on a scrap paper and then transfer it to the report sheet at your lab station.

2. False: The lab instrumentation does not determine the number of significant figures. The number of significant figures in a measurement is determined by the instrument's precision and the uncertainty in the measurement. The rule you mentioned, where the number of significant figures is determined by the smallest number being multiplied, applies when performing calculations with measurements.

3. False: To calculate the standard deviation of a data set, you need at least two data points. The standard deviation measures the spread of the data around the mean, and this calculation requires multiple data points.

4. True: To determine the relative deviation in the analysis of a data set, both the standard deviation and the average of the data need to be determined. The relative deviation is a measure of how spread out the data is relative to the average value.

Overall, your understanding of the statements is correct.

Let's go through each statement one by one:

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. This statement is correct. It is common practice to record data on a paper scrap and then transfer it to the report sheet at your lab station for proper documentation.

2. The lab instrumentation determines the number of significant figures when recording quantitative data.

FALSE. The number of significant figures in a measurement is determined by the measuring instrument's precision and the smallest increment it can measure. The number of digits in the smallest number being multiplied does not determine the number of significant figures. So, this statement is incorrect.

3. For scientific data, only one data point is necessary to calculate its standard deviation.

FALSE. To calculate the standard deviation, you need at least two data points. The standard deviation measures the variability within a dataset, and you need more than one data point to measure that variability accurately. Therefore, this statement is incorrect.

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. The relative deviation is a measure of the spread of data points relative to the mean or average. To calculate the relative deviation, you need both the standard deviation (which measures the spread) and the average (which serves as the reference point). Hence, this statement is correct.

Based on the explanations provided, statement 1 is True, statement 2 is False, statement 3 is False, and statement 4 is True.

I hope this clears up any confusion. If you have any more questions, feel free to ask!