Ans. mean mass = 201.3 g
std. deviation = 1.3
significant figure in mean mass = 4
most probable mass may either (201.3 + 1.3) or (201.3 - 1.3) = 202.6 g or 200.0g
Suppose that a series of measurements have shown that the mean mass of an object is...
6. Suppose the mass of an object and its density were determined independently by four students giving the following measurements. N=trial # mass volume Density (X) X-Xavg X-Savg Squared 2.040 g 0.49 mL 2.062 g 0.53 mL 2.039 g 0.50 mL 2.043 g 0.50 mL Sum of SD = + - Squares Square Root Sum of Divided Of this # Squares: by N-1 =+/- Avg = Xavg What is the average density of the object? What is the standard deviation...
Please show work and
explain
Problems 16&17. Mass spectral measurements were made on 10 replicate low concentration Pb-EDTA samples: 172.3, 132.7, 142.7, 157.7, 126.7, 196.1, 147.7, 152.3, 141.7, and 159.3 counts. The mean and standard deviation of these counts from low concentrations is 153 $15. Ten measurements of a blank had a mean measurement of 100. counts. A sample containing 3.00 UM Pb-EDTA gave a measurement of 770 counts. Estimate the concentration detection limits for Pb-EDTA. 16. What is the...
Suppose you have the following data, with a mean and standard deviation of 5 and 2.1 3 3 4 5 7 8 If you were to subtract 2 from every observation, what change - if any- would you see in the transformed mean and standard deviation? the mean and standard deviation would decrease the mean wold stay the same but the standard deviation would decrease the mean and standard deviation would stay the same the mean would decrease but the...
nown mass, mu. You wish to find the mass of this object. The room is a meterstick, a fulcrum to balance the meter stick on, 2) You have an object equipment you have in the some string, and a small electronic scale. The scale is meterstick, ms, error able to get the mass of the ut the unknown mass exceeds the limit of the scale and reads as an a) Explain the procedure you would use with the meterstick, fulcrum,...
1. Suppose you have a sample of size 100 with mean 5 and standard deviation 2. Construct a 95% confidence interval for the population mean. 2. For a random sample of 50 measurements on the breaking strength of cotton threads, the mean breaking strength was found to be 210 grams and the standard deviation 18 grams. Calculate a 90% confidence interval for the true mean breaking strength of cotton threads of this type.
We have n=1000 measurements whose mean and variance respectively, are x̅=6 and S²=9.(a) What is the minimum number of measurements that lie inside [0,12]. Indicate the mumber and explain how it was obtained.(b) If you know thit the shape of the distribution of the menstirements is bell-shmped and uymmetrical, then npproximately how many measurements are in the interval [3,9]. Indicate the mumber and expluin liow it was obtained.
The range of a set of measurements is the difference between the largest and the smallest values. The empirical rule suggests that the standard deviation of a set of measurements may be roughly approximated by one-fourth of the range that is, -**, G range The acidity of soils is measured by a quantity called the pH, which may range from 0 (high acidity) to 14 (high alkalinity). A soil scientist wants to estimate the average pH for a large field...
2. Suppose that we are attempting to estimate the mean of a Gaussian distribution describing a set of scalar measurements, x. Assume that the variance of the distribution is known to be,02-9. (a) Suppose that we have some independent sample measurements of the sensor output as shown below. What is the maximum likelihood estimate of the mean? Samples 7, 4, 7, 3, 1,-1, 3, 5, 2, 1 (b) Suppose based on some prior measurements, we have a prior distribution on...
1. Why are several readings taken for each physical quantity in an experiment? 2. A single reading taken with a meter stick for the length of a cylinder is 5.5 cm. What is the probable percent error in the reading? 3. The following readings were taken with a meter stick for the length of a cylinder: 5.5 cm, 5.3 cm, 5.4 cm, 5.5 cm and 5.6 cm. Calculate the standard deviation of the mean, the stand error and the probable...
1-the volume of an object is 4.16cm3. its mass is 23.05grams. how many significant figures will its density have? 2- express the following in scientific notation a)63.45 b) 0.0046 c) 86,000.01