Skoog.151.7-22. Two different analytical methods were used to determine residual chlorine in sewageeffluents. Both methods were used on the same samples, but each sample came from various locationswith differing amounts of contact time with the effluent. Two methods were used to determine theconcentration of Cl in mg/L, and the results are shown in the following table:SampleMethod AMethod B10.390.360.841.3531.762.5643.353.924.695.357.708.33710.5210.708.10.9210.91(a) What type of t test should be used to compare the two methods and why?(b) Do the two methods give different results? State and test the appropriate hypotheses.(c) Does the conclusion depend on whether the 90%, 95%, or 99% confidence levels are used?

Given information: The data represents the concentration of CI in mg/L for a sample of 8…

Answered: Two different analytical methods were…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Two different analytical methods were used to determine residual chlorine in sewage effluents. Both methods were used on the same samples, but each sample came from various locations with differing amounts of contact time with the effluent. Two methods were used to determine the concentration of Cl in mg/L, and the results are shown in the following table: Sample Method A Method B 1 0.39 0.36 2 0.84 1.35 3 1.76 2.56 4 3.35 3.92 5 4.69 5.35 6 7.70 8.33 7 10.52 10.70 8 10.92 10.91 a) What type of t-test should be used to compare the two methods and why? b) Do the two methods give different results? State and test the appropriate hypotheses. c) Does the conclusion depend on whether the 90%, 95%, or 99% confidence levels are used?
Two different analytical methods were used to determine residual chlorine in sewage effluents. Both methods were used on the same samples, but each sample came from various locations with differing amounts of contact time with the effluent. Two methods were used to determine the concentration of Cl in mg/L, and the results are shown in the following table: Sample Method A Method B 0.36 1.35 2.56 3.92 5.35 1 0.39 2 0.84 3 1.76 3.35 4.69 4 8.33 10.70 7.70 7 10.52 8 10.92 10.91 a. What type of t test should be used to compare the two methods and why? b. Do the two methods give different results? State and test the appropriate hypotheses. Does the conclusion depend on whether the 90%, 95%, or 99% confidence levels с. are used?
Two different analytical methods were used to determine residual chlorine in sewage effluents. Both methods were used on the same samples, but each sample came from various locations with differing amounts of contact time with the effluent. Two methods were used to determine the concentration of Cl in mg/L, and the results are shown in the attached table. A. What type of t test should be used to compare the two methods and why? B. Do the two methods give different results? State and test the appropriatehypotheses at 95% confidence level. C. Does the conclusion depend on whether the 90%, 95%, or 99% confidence levelsare used?
Two different analytical methods were used to determine residual chlorine in sewage effluents. Both methods were used on the same samples, but each sample came from various locations with differing amounts of contact time with the effluent. Two methods were used to determine the concentration of Cl in mg/L, and the results are shown in the following table: Answer the following questions as per the table: - 1.What type of t test should be used to compare the two methods and why? 2.Do the two methods give different results? State and test the appropriate hypotheses. 3.Does the conclusion depend on whether the 90%, 95%, or 99% confidence levels are used?
A sociologist wants to determine if the life expectancy of people in Africa is less than the life expectancy of people in Asia. The data obtained is shown in the table below. Africa Asia = 63.3 yr. 1 X,=65.2 yr. 2 o, = 9.1 yr. = 7.3 yr. n1 = 120 = 150
Samples are collected from the River X and pH values are observed. 9 different pH values arelisted in table 3.Table 3Concentrations 4.2 3.8 6.0 3.5 8.1 4.9 4.1 3.2 4.0Draw box plot and finda. Bowley’s coefficient of skewnessb. Karl Pearson’s coefficient of skewnessc. Third momentRubricStages of Process MarksImagine and Plan 2Composition 2Effort 1
A multivitamin sample was assayed for its Fe content in The analysis produced an average assay of 19.8 The actual Fe content of the sample was known to be exactly 20 ppm Fe. Find the absolute and relative 1. ppm. ppm. errors. 2. The 2 data sets are replicates of pH values of an alkaline solution (set A) and acidic solution (set B). (1) which is more precise? (2) which is more accurate? A) 11.2, 10.7, 10.9, 11.3, 11.5, 10.5, 10.8, 11.1, 11.2, 11.0 (x = 10.7) 5.2, 6.0, 5.2, 5.9, 6.1, 5.5, 5.8, 5.7, 5-7, 6.0 (x = 5.8) B)
Samples are collected from the River X and pH values are observed. 9 different pH values are listed in table 3. Table 3 Concentrations 4.2 Draw box plot and find a. Bowley's coefficient of skewness b. Karl Pearson's coefficient of skewness c. Third moment 3.8 6.0 3.5 8.1 4.9 4.1 3.2 4.0
2. Two kinds of bumper guards, six of each kind, were mounted on a certain make of compact car. Each car was then run into a concrete wall at 5 miles per hour and the costs of repairs (in dollars) was recorded. Summary of the data is shown below. n = 6 i = 144 si = 363.20 n =6 i = 149 si = 202.00 Test at the 0.02 level of significance whether it is reasonable to assume that the two populations sampled have equal variances.
4. Two different analytical methods were used to determine residual chlorine in sewage effluents. Both methods were used on the same samples, but each came from various locations, with differing amounts of contact time with the effluent. The concentration of Cl in mg/L was determined by the two methods, and the following results were obtained:Method A: 0.39, 0.84, 1.76, 3.35, 4.69, 7.70, 10.52, 10.92Method B: 0.36, 1.35, 2.56, 3.92, 5.35, 8.33, 10.70, 10.91What type of t test should be used to compare the two methods and why? (b) Do the two methods give different results? (c) Does the conclusion depend on whether the 90%, 95% or 99% confidence levels are used?
One operation of a mill is to cut pieces of steel into parts that will later be used as the frame for front seats in an automobile. The steel is cut with a diamond saw and requires the resulting parts to be within 10.005 inch of the length specified by the automobile company. Data are collected from a sample of 50 steel parts and are shown in the following table. The measurement reported is the difference in inches between the actual length of the steel part, as measured by a laser measurement device, and the specified length of the steel part. For example, the first value, -0.003, represents a steel part that is 0.003 inch shorter than the specified length. Complete parts a through c Click the icon to view the data table. a. Construct a frequency distribution Difference in Length -0.005 but less than -0.003: -0.003but less than -0.001 -0.001but less than 0.001 0.001but less than 0.003 0.003but less than 0.005 Frequency Difference Between Actual and Specified Lengths 0.002 0 -0.003…
Han Samples are collected from the River X and pH values are observed. 9 different pH values are listed in table 3. Table 3 Concentrations 4.2 3.8 6.0 3.5 8.1 4.9 4.1 3.2 4.0Draw box plot and find a. Bowley’s coefficient of skewness b. Karl Pearson’s coefficient of skewness c. Third moment

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