The additive in gasoline was measured six times with the following results: 0.13, 0.12, 0.16, 0.17, 0.20 and 0.11 ppm, the confidence interval at 99% confidence level would be: (t = 4.03) o 0.15 ±0.04 ppm O 0.15 ± 0.02 ppm O 0.15 ± 0.03 ppm O 0.15± 0.08 ppm O 0.15 ± 0.06 ppm

The additive in gasoline was measured six times with the following results: 0.13, 0.12, 0.16, 0.17, 0.20 and 0.11 ppm, the confidence interval at 99% confidence level would be: (t = 4.03) o 0.15 ±0.04 ppm O 0.15 ± 0.02 ppm O 0.15 ± 0.03 ppm O 0.15± 0.08 ppm O 0.15 ± 0.06 ppm

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter2: Basic Statistical Analysis With Excel

Section: Chapter Questions

Problem 12P

See similar textbooks

Related questions

Q: By 10 repeated measurements, the average concentration and standard deviation of Cd²+ in drinking…

A: A 95% confidence interval is a range of values above and below the point estimate within which the…

Q: Part B The accepted value of Ksp for Ag2 CrO4 is 1.1x10-¹ experimentally determined value given…

Q: Molarity trail 1 0.0366 trail 2 0.0373 trail 3 0.0370 Calculate the standard deviation. Calculate…

Q: Dr. Caras was characterizing a cytochrome (an iron containing protein) from a new strain of…

A: First calculate mean (μ) of 8 measurements. Sum of all measurements = 2.5719 Mean of all…

Q: You are measuring the isooctane concentration in a hydrocarbon mixture with a chromatographic…

A: Plot the calibration curve by plotting isooctane concentration on x-axis and peak area on y-axis.

Q: answer below. 51.7+27 8 75 6+ 13 9 161.7.189 5) 75 6 - 13.9< µ < 175.6 + 13.9

A: 161.7 <¶ < 189.5

Q: A group of students titrate a calcium carbonate standard solution repeatedly in five experimental…

A: Average concentration = 80.5 ppm Standard deviation = 0.5 ppm Confidence interval = 95% Number of…

Q: AA (mg/g) UV (ug/ml) Sample (ug/ml) Unknown Fe solution 1 Unknown Fe solution _2 0.322 8.136 0.318…

A: Mean, standard deviations, confidence limit are calculated using respective formulas. We can't use…

Q: The following experimental data was collected by a student: 0.0020 M Fe(NO3)3 mL Trial 1234 Blank…

A: Given :- . Kc = ? -------------------------------------

Q: The density of water varies with temperature. T / oC Density / g mL–1 19.00…

A: Linear interpolation is a method of curve fitting used to estimate the value of a function for an…

Q: The following experimental data was collected by a student: 0.0020 M Fe(NO3)3 mL Trial 1 2 3 4 Blank…

Q: Two analytical methods (potentiometry and amperometry) were used to determine the concentration of…

A: A 95% confidence interval is a range of values above and below the point estimate within which the…

Q: 3-3 Types of Error; 3-4 Propagation of Uncertainty from Random Error (30 min) If A = 3.475 (+0.002),…

Q: Propagate the error in the following expression: (0.5847(±0.0002)mole / 250.0(0.1)??) ×(1000 ml / 1…

A: Given: (0.5847(±0.0002) mole250(0.1) mL)×1000 mL1 L Uncertainty for division operation is given…

Q: A method to determine an antibiotic was developed and validated in a pharmaceutical company. The…

A: In the given question, calculate the number of samples to be analyzed to ensure that the antibiotic…

Q: Given: 3 Pt2+(aq) + 2 Cr(s) ⟶ 2 Cr3+(aq) + 3 Pt(s) Eo = +0.44 v [Cr3+] = 0.512…

Q: 1. How many milliliters of 53.40(±0.06) (w/w) % NaOH with a density of 1.52(±0.01)g/mL will you…

Q: Calcium Chloride Ammonium Chloride Trial 1 Trial 2 Trial 3 Trial 1 Trial 2 Trial 3 Mass…

Q: Caffeine in a sample of chocolate was measured five times, and the results were 1265 ppm caffeine…

A: In the given question we have to if the results are statistically different from the label value at…

Q: After determining the absorbance of several standards of known concentration, the trend line for a…

A: Given data :

Q: Suppose that you used smaller volumetric apparatus to prepare 0.250 M NH3 solution by diluting 84.6…

A: According to the question we have, The volume of NH3 solution = V1= 84.6(±0.8) μL= 0.0846 (±0.8) ml…

Q: Given: Volume of Ca(OH)2 (mL) Initial burette reading (mL) Final burette reading (mL) Volume of HCl…

A: This question belongs to the titration of Ca(OH)2 and HCl. 3 trials are done and volume is…

Q: You are trying to come up with a drug to inhibit the activity of an enzyme thought to have a role…

A: In the case of uncompetitive inhibition, Ki for the inhibitor is calculated as shown in equation…

Question

The additive in gasoline was
measured six times with the
following results: 0.13, 0.12, 0.16,
0.17, 0.20 and 0.11 ppm, the
confidence interval at 99%
confidence level would be: (t
= 4.03)
o 0.15 ±0.04 ppm
O 0.15 ± 0.02 ppm
O 0.15 ± 0.03 ppm
O 0.15± 0.08 ppm
O 0.15 ± 0.06 ppm

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions

A chemist obtained the following data for percent lindane in the triplicate analysis of an insecticide preparation: 7.23, 6.95, and 7.53%. Calculate the 90% confidence interval for the mean of the the three data, assuming that (a) the only information about the precision of the method is the precision for the three data. (b) on the basis of long experience with the method, it is believed that s---->σ lindane. (c) If s=0.28 is good estimate of σ, how many replicate measurement should be made in order for the mean for the analysis of sample to be within 0.2% of the true mean 90% of the time.
Only Part B, A is right.
An atomic absorption method for the determination of the amount of iron present in used jet engine oil was found from pooling 30 triplicate analyses to have a standard deviation s = 3.1 µg Fe/mL. If s is a good estimate of o, calculate the 95 and 99% confidence intervals for the result 21.7 µg Fe/mL if it was based on the following criteria. (a) a single analysis 95% confidence interval= 21.7 + 99% confidence interval = 21.7 + (b) the mean of two analyses 95% confidence interval = 21.7 + 99% confidence interval= (c) the mean of six analyses 21.7 ± 95% confidence interval = 21.7 + 99% confidence interval= 21.7 + μg Fe/mL μg Fe/mL μg Fe/mL μg Fe/mL μg Fe/mL μg Fe/mL
Only typed solution
1-arr In a study of the gas phase decomposition of phosphine at 120 °C PH3(g)- →1/4 P4(g) + 3/2 H2(g) the concentration of PH3 was followed as a function of time. It was found that a graph of In[PH3] versus time in seconds gave a straight line with a slope of -2.50×10² s1 and a y-intercept of -3.24. Based on this plot, the reaction i v O order in PH, and the half life for the reaction is seconds. zero first second
A chemist obtained the following data for percent lindane in the triplicate analysis of an insecticide preparation: 7.23, 6.95, and 7.53. Calculate the 95% confidence interval for the mean of the three data, assuming the following criteria. (a) the only information about the precision of the method is the precision for the three data Confidence interval = ± % lindane (b) on the basis of long experience with the method, it is believed that s --> o = 0.26% lindane Confidence interval = ± % lindane
7
49 measurements of a variable have been made, resulting in a mean of 9.491 and a population standard deviation, σ, of 1.212. Indicate whether any of the following values can be rejected using the 2sm criterion: 9.357; 9.399; 9.577; 9.605?(A). Yes, 9.357 and 9.605 can be rejected(B). Yes, 9.357 can be rejected(C). Yes, 9.605 can be rejected(D). No, none should be rejected
106CO2 + 50 SiO, + 16HNO, + H,PO, + 0.001FE + 122H,O → (CH,0),06(SiO,)so(NH3),e(H3PO,)Feo.001 + 13802 a. Calculate the change in (total) CO, in the ocean surface mixed (Temp = 25C, Salinity = 35 ppt) layer if 1 nM of iron is added (and consumed), assuming it is indeed the limiting nutrient. %3D b. Would this change in total CO, affect the alkalinity of the surface ocean? Why/why not? c. How much would the pH of the surface change following this primary production (assuming no respiration/gas exchange)? Use pCO2 = 420 ppm and total alkalinity = 2.2 mM to start your calculations. %3D
An atomic absorption method for the determination of the amount of iron present in used jet engine oil was found from pooling 30 triplicate analyses to have a standard deviation s = 3.6 mg Fe/mL. If s is a good estimate of σ, calculate the 95 and 99% confidence intervals for the result 18.5 mg Fe/mL if it was based on (a) a single analysis, (b) the mean of two analyses, and (c) the mean of four analyses.
#29 b
For the determination of iron in used jet engine oil, 30 analyzes with 3 repetitions each were made by atomic absorption method and the standard deviation was found s=2.4 µg Fe/mL. Since this standard deviation value is close to the ϭ value, the iron concentration of 18.5 µg Fe/mL(a) by a single analysis,(b) as the average of the two analyzes,(c) Calculate the 80% and 95% confidence intervals if found as the mean of four analyses.