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 0.39 2 0.84 3 1.76 2.56 3.92 3.35 4.69 4 5.35 8.33 10.70 5 6. 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. 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 0.39 2 0.84 3 1.76 2.56 3.92 3.35 4.69 4 5.35 8.33 10.70 5 6. 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. c. Does the conclusion depend on whether the 90%, 95%, or 99% confidence levels are used?

Name: Two different analytical methods were used to determine residual chlo
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: Two different analytical methods were used to determine residual chlorine in sewageeffluents. Both methods were used on the same samples, but each sample came fromvarious locations with differing amounts of contact time with the effluent. Two method

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Q: Let ?1 denote true average tread life for a premium brand of P205/65R15 radial tire, and let ?2…

A: The given values are m=45,x=42100,s1=2400,n=45,y=36200,s2=1800.

Q: 5. Identify each of the following examples as attribute qualitative) or numerical (quantitative)…

A: 5.a). The given case in point is an attribute since the residence for each pupil is not usually…

Q: The Board of Transportation and Safety (BTS) wants to examine the safety mechanisms of A, B, and…

Q: 1. Corrosion of still reinforcing bars is the most important durability problem for reinforced…

A: Note: Hey there! Thank you for the question. As you have posted several sub-parts of a question,…

Q: The data were collected from a statistics class. The column heads give the variable, and each of the…

A: The objective is to find another categorical variable that might have been recorded for the…

Q: I need help to find the test statistic

A: Step…

Q: An article in the Journal of Applied Polymer Science (Vol. 56, pp. 471-476, 1995) studied the effect…

A: Let X denote the mole ratio as the independent variable.Let Y denote the viscosity as the dependent…

Q: Q1: The effect of three different lubricating oils on fuel economy in truck engines is being…

A: NOTE: As per the guidelines, we are supposed to solve first 3 sub parts only. Given: Different…

Q: ) What type of t-test should be used to compare the two methods and why? b) Do the two methods give…

A: Given 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…

Q: 1. Soil samples were collected at two areas surrounding an abandoned mine and analyzed for lead. At…

A: Given Area A-1.2,1.0,0.9,1.4 Area B-0.7,1.0,0.5,0.6,0.4

Q: Butterfly wings. Researchers studied the morphological attributes of monarch butterflies (Danaus…

A: Given sample size(SS)(n)=92 confidence interval(CI)=95% sample mean(SM)(x)=11.796 sample standard…

Q: The concentrations of K+ in water were measured with atomic absorption spectroscopy (AAS) and atomic…

A: Obtained sample observations (measured in ppm) are:

Q: Let ?1 denote true average tread life for a premium brand of P205/65R15 radial tire, and let ?2…

A: Answer Given Sample mean [x] =42100 Sample mean [y] =36200 Sample standard deviation [s1] =2400…

Q: Royal Palm Hospital has 500 beds and 55 bassinets. As the HIM manager, you report monthly…

A: Note: Since you have asked multiple question, we will solve the first question for you. If youwant…

Q: Rhino viruses typically cause common colds. In a test of the effectiveness of echinacea, 43 of the…

A: Solution To find the confidence interval we will use the z distribution i.e. z critical value.

Q: The rare earth element gadolinium is often used as a contrasting agent for MRIS. The concentration…

Q: The spotted lanternfly, Lycorma delicatula, is an invasive species to the United States that has the…

A: Given that Length of insect: AVG = 1 inch, SD = 0.15 inchNumber of eggs: AVG = 40 eggs, SD = 5 eggsr…

Q: A proposed new method for the determination of sulfate in an industrial waste effluent is compared…

A: For Existing : Mean , x1¯ = 72 Standard deviation , s1 = 3.38 For New : Mean , x2¯ = 72 Standard…

Q: The following data gives the means of two samples taken from a population. Test whether there is any…

A: Given information: x=60y=59n1=100n2=200σ=50level of significance, α=0.05

Q: Find the value of “z sub alpha” z0.15 And for z0.02

A: The z0.15 denotes the z score for the area of 0.15 to the right of it.

Q: Coke is a solid fuel made by heating coal in the absence of air so that the volatile components are…

A: Given: The provided data for porosity factors of supply of screened coke from a supplier is:…

Q: 24. The treatments and experimental units in the study are respectively. O A. carbon dioxide levels;…

A: Treatment is the measure that used to levels of treatments applied in the experimental unit.…

Q: 2. Calculate the coefficients of a linear equation to predict the yield Y as a function of X. 3.…

A: Scatter Plot The Scatter diagram method is a quick at-a-glance method of determining an apparent…

Q: 3) A study of estrogen levels in two different groups of women finds the following results (in…

A: The given summary of the statistics is, The type of test is two tailed test

Q: The data below are the temperatures on randomly chosen days during a summer class and the number of…

Q: concentration differs among the three days? Use the =α0.05 level of significance and the ANOVA…

Topic Video

Question

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?

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

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

$Hypothesis Tests and Confidence Intervals for Means$

Learn more about

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

Similar questions

Your teacher gives you your z score and expects you to find out your raw score for the first test. Find your raw score from the following information:z=-1.23, µ=82 andσ=4
8
SS and SS between for the following 4. Calculate SS total within set of data: Treatment 1 Treatment 2 Treatment 3 n = 10 n = 10 n = 10 N = 30 G = 60 T = 10 T = 20 T = 30 %3D SS = 27 SS = 23 EX = 206 SS = 16 %3! %3! %3D
7. 0.5 L = mL 23. 150 µg = %3D mg 8. 3.5 gm = mg 24. 16 fluid ounces = mL 9. 1.5 L = mL 25. 250 mL =
Hydrogen content is conjectured to be an important factor in porosity of aluminum alloy castings. An article gives the accompanying data on x = content and y = gas porosity for one particular measurement technique. 0.18 0.20 0.21 0.21 0.21 0.22 0.23 0.23 0.24 0.24 0.25 0.28 0.30 0.37 0.48 0.71 0.42 0.44 0.55 0.44 0.24 0.48 0.22 0.82 0.86 0.72 0.70 0.74 Minitab gives the following output in a response to a Correlation command: Correlation of Hydrcon and Porosity = 0.425 (a) Test at level 0.05 to see whether the population correlation coefficient differs from o. State the appropriate null and alternative hypotheses. O Ho: p = 0 Hip 0 O Ho: p = 0 Hip + 0 O Ho: p+0 Hip = 0 Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to three decimal places.) t = P-value = State the conclusion in the problem context. O Fail to reject H: The data does not suggest that the population correlation coefficient differs significantly…
Given that n=82 data points are collected when studying the relationship between average daily temperature and time spent watching television, use the critical values table below to determine if a calculated value of r=−0.974 is significant or not. df CV (+ and -) df CV (+ and -) df CV (+ and -) df CV (+ and -) 1 0.997 11 0.555 21 0.413 40 0.304 2 0.950 12 0.532 22 0.404 50 0.273 3 0.878 13 0.514 23 0.396 60 0.250 4 0.811 14 0.497 24 0.388 70 0.232 5 0.754 15 0.482 25 0.381 80 0.217 6 0.707 16 0.468 26 0.374 90 0.205 7 0.666 17 0.456 27 0.367 100 0.195 8 0.632 18 0.444 28 0.361 9 0.602 19 0.433 29 0.355 10 0.576 20 0.423 30 0.349 Select the correct answer below: r is significant because it is between the positive and negative critical values. r is not significant because it is between the positive and negative critical values. r is significant because it is not between the positive and negative critical values. r is not…
Question 2. The U.S. Geological Survey collected atmospheric deposition data in the Rocky Mountains. Part of the sampling process was to determine the concentration of ammonium ions (in percentages). Here are the results from 20 samples: 41 2.7 3.5 14 70 4.2 4.9 4.6 42 4.8 44 65 31 3.9 3.7 5.6 13.3 3.5 3.7 52 2.6 28 4.8 27 Rank the data from lowest to highest, and calculate the following: a. Q1- the 25th percentile b. Q2 the median or 50th percentile c. Q3- the 75th percentile d. The 20th percentile (P20) and the 80th percentile (Pec) e. Show the 5 number summary.
In a study of crop losses due to air pollution, plots of Blue Lake snap beans were grown in open-top field chambers, which were fumigated with various concentrations of sulfur dioxide. After a month of fumigation, the plants were harvested, and the total yield of bean pods were recorded for each chamber. Suppose X = sulfur dioxide concentration (ppm) and Y = yield (kg). Here is the information about the data. n = 17, xbar (sample mean of X) = 0.12, ybar (sample mean of Y) =1.117, sX = 0.11724, sY = 0.31175, r = -0.8506, SS(resid) = 0.2955 residual standard deviation (se) = 0.14 slope of the least-squares regression line: -2.26 Using the given information, what is the standard error of the slope (SEb1)? what’s the value of the test statistic (ts)?
A pet food company is concerned that their pet food must have a certain % of the mineral 2Ine II the food. Too little and dogs get very sick. If the machinery is working correctly, the average zinc is µu = .375 gram/lb of food. They sample 25 bags of food and find: x = .359 grams o = .05 grams The firm wants to know if their pet food is healthy. They decide on a 95% level of significance. Do the Z test. They ask you to perform the analysis. a) State the null and alternative hypotheses. Ho: На: b) Draw a picture/graph of what you are trying to find. c) Find the critical value you will use. d) Compute the test statistic (from the data) e) What do you conclude? Why?
The data in the table below consist of measurements y₁, y2, y3, and yn of the ramus bone at four different ages on each of 20 boys. 1. Find y. 2. Find Sn 3. Find R Ramus Bone Length at Four Different Ages for 20 Boys. Age Individual 1 23 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 8 yr (yi) 47.8 46.4 46.3 45.1 47.6 52.5 51.2 49.8 48.1 45 51.2 48.5 52.1 48.2 49.6 50.7 47.2 53.3 46.2 46.3 8½ yr (Y2) 48.8 47.3 46.8 45.3 48.5 53.2 53 50 50.8 47 51.4 49.2 52.8 48.9 50.4 51.7 47.7 54.6 47.5 47.6 9 yr (Y3) 49 47.7 47.8 46.1 48.9 53.3 54.3 50.3 52.3 47.3 51.6 53 53.7 49.3 51.2 52.7 48.4 55.1 48.1 51.3 9½ yr (Y4) 49.7 48.4 48.5 47,2 49.3 53.7 54.5 52.7 54.4 48.3 51.9 55.5 55 49.8 51.8 53.3 49.5 55.3 48.4 51.8
Answer B
2. The amount of protein in the bloodstream (mg/L) is given below for 30 patients: 2.0 2.5 1.4 1.8 1.8 1.9 2.7 2.9 3.3 3.8 4.3 4.8 4.9 5.1 5.8 5.9 6.8 6.8 7.0 7.2 7.7 8.0 8.0 8.7 11.0 11.1 12.0 12.1 12.3 12.3 b) Create a stem-and-leaf plot for the above given data: