What is limit of detection? What is standard deviation?

Q: The precision of an experiment is best described by O the % error O the true value O the % deviation…

A: % Error can be determined measuring deviation from true or accepted  value in terms of % . Where…

Q: Scores from the midterm statistics exam followed a normal distribution with a mean of 68 and a…

A: Answer : Z =  (x-u)/sd Z =  (86-68) / 10 Z = 1.8

Q: Standard deviation is an indication of the... a. precision of one measurement b. accuracy of one…

A: Standard deviation:a number which is used to inform how measurements for a group are spread out from…

Q: Which is the total predictive error?

A: In chemistry there are many ways to check the deviation of experimental data from the accurate…

Q: help me find the standard deviation

A:

Q: 2. Students measured and recorded the mass of a rock four times. The true mass of the rock is known…

A: Solved in step 2

Q: A measurement of the mass of a specimen was determined to be 4.203 +- 0.001 g. What is fractional…

A:

Q: Can you explain why did it have to be multipled to the boxed conversion factor.

A: Given:            Given mass (m) =  20 g NaCl             Volume of solvent = 2 L…

Q: Five blood samples got these results: 0.752, 0.756, 0.752, 0.751, 0.76G ppm The standard deviation…

A: Given data,  0.752, 0.756, 0.752, 0.751, 0.760 Calculate standard deviation?

Q: . A study of body mass index (BMI) in adults showed that for men aged 40–44, the mean BMI level is…

A:

Q: Using the data you have collected for Part II of the experiment, complete the following table. For…

A: Given Data:To determine:The Average Kf and standard deviation

Q: 0.044 is a good

A: Standard deviation --- standard deviation is statistics that measures the dispersion of dataset…

Q: Solutions: pH of solution Concentration of H3O+ (616) Absorbance at Amax(for B²-) Concentration of…

A:

Q: Why are repeated trials of the same measurement desirable

A: Repeated trials means measurement of same  data repeatedly.

Q: How do you find the standard deviation and average deviation using the data table above?

A: Given, Molarity of NaOH=0.0767 M, 0.0860 M, 0.0775 M Average,x¯= 0.080 M n=3 To calculate, Average…

Q: Give two examples of the offset errors

A: Offset error arises due to the initial point is not calibrated to zero.

Q: Predict the product of the following reaction. i H2SO4 NH(CH,CH3)2 - H₂O

A: Given,The reaction:

Q: If the unknown is vinegar (Note 1), pipet 25.00 mL into a 250 mL volumetric flask and dilute to the…

A: Given, Concentration of NaOH  = 0.1 M Volume of NaOH used   = 24.84 ml Volume of CH3COOH     = 50 mL…

Q: The experimental error is due to sampling and method error only. tru or false

A: The question is based on the concept of analytical chemistry. we have to discuss about various types…

Q: Does standard deviation give a measure of precision or accuracy?

A: Interpretation - Does standard deviation give a mesure of precision or accuracy -      Introduction…

Q: How do you find the standard deviation with these calculations?

A: If n is the number of observations, m is the mean value of all the observation and the set of the…

Q: NO₂

A: Determine the number of valence electrons: The number of valence electrons can be determined from…

Q: please help with this question : The research process in which new data will be collected and…

A: A research process can be either primary, secondary, tertiary, or cross-sectional research which…

Q: The accepted density of Manning is 18.00g/mL. Your lab team measures the density of Manning to be…

A:

Q: Give the standard deviation of the following numbers: 2.01, 2.10, 2.20, 2.41. Use appropriate…

A: The formula to calculate   the standard deviation is : σ = ∑0i(Xi -X)¯     2/N Where  σ = standard…

Q: Compare and contrast the following: (a) error and uncertainty, and (b) random error and systematic…

A:

Q: Determine the average and standard deviation for the following set of numbers. 45.6g, 52.1g, and…

A: Solution - According to the question - Given  number - 45.6g, 52.1g, and 53.8g  Average = (45.6 +…

Q: Define and compare accuracy and precision.

A: The degree to which the given value is correct and is free from error is termed as accuracy.

Q: 2N₂Os (9) 4NO₂(g) + O₂(g) [NO₂0₂] N₂O₁ O Ke OK, O K. = NO, No, N₂O₂ NO₂0₁

A: The equilibrium constant expression for a general chemical equation: aA + bB ↔ cC + dD is: Kc =…

Q: Suppose a student completes an experiment with an average value of 2.9 mL and a calculated standard…

A: Range for 1 SD (Standard deviation) is expressed as- Average±SD Where Maximum value = Average + SD…

Q: 4-The density of water at 4°Cs known to be 1.00 g/ml kim experimentally found the density of water…

A: Given the density of water at 4 degree centigrade is 1.00g/ml. Experimental density of water is…

Q: The density of an irregular shaped object was measured three times with the following results: 2.15…

A: Standard deviation: The dispersion of a group measured values from the average value can be known by…

Q: A chemical industry discharges a waste contaminated with trichloroethylene (TCE) to the city sewer…

A: The concentration of TCE obeys the normal distribution.                        Mean, μ=0.064…

Q: Determine the Average Mass and the Standard Deviation for the following data: Mass of pennies in…

A: The average mass is equal to the sum of all mass divided by the total number of masses.

Q: mols Molarity of NaOH calculated from previous section 0.080m Unknown number or letter Final ml NaOH…

A: The question is based on the concepts of analytical chemistry. based on the data provided,we need to…

Q: How do I find the average deviation and the percent error?

A: "Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: ing statements is true of the detection limit of an instrument?

A: The first question is based on antiquity, so instead of solving it, solve the second question with…

Q: Answer the following questions below based on the photo attached. What is the precision (in words)…

A: There are many types of contact and contact-free thermometers. Most scientists measure temperature…

Q: Remember that is the symbol for sum. In other words, we will take the sum of the relative abundance…

A: Symbol                    Mass number                 Isotopic mass(amu)                     Percent…

Q: Estimate S/N for the following data

A: To Calculate: S/N ratio of given data From the graph, the values obtained are: Blank 1 Blank 2…

Q: Student B determined the density of water to be 1.04 ± 0.05 g/mL. Consider Students A results. Which…

A: Student B value is more accurate.  Accuracy is measure of value more close to the real value. Since…

Q: The accuracy of an experiment is best described by O the % deviation O the average value O the %…

A:

Q: A student determines the concentration of an unknown sample using two different methods. Each method…

A: Formation of comparison table for comparing the given data of both the methods: Observations…

Q: Which of the following sentence is correct: O Random errors cause outliers O Random error affects…

A: Errors are the deviation from the correct value.  Errors can be of different types, like random…