The DENR has a new procedure to detect algal bloom in water being tested. This new procedure is important because, it could be used to detect three different contaminants-organic pollutants, volatile solvents, and chlorinated compounds. The department claims that it can detect high levels of organic pollutants with 99.95% accuracy, volatile solvents with 89.70% accuracy, and chlorinated compounds with 99.70% accuracy. If an algal bloom is not present, the test does not signal. Samples are prepared for the calibration of the test and 60% of them are contaminated with organic pollutants, 27% with volatile solvents, and 13% with traces of chlorinated compounds. A test sample is selected randomly. Denote as follows: S = signal, O = organic pollutants, V = volatile solvents, C = chlorinated compounds. If the test signals, what is the probability that chlorinated compounds are present? (Show complete solution in your answer sheet) O a. P(C|S) = 0.1334 b. None among the choices Oc. P(C|S) = 0.1386 d. P(C|S) = 0.1184
Q: For any given alpha level, x2crit _________.
A: i) let, α = 0.05 r is the total number of row and c is the total number of column. lets assume r =…
Q: Alexa hypothesizes that consuming whole-grain cereal for breakfast will cause students to take part…
A:
Q: A healthcare provider notices an outbreak of foodborne illness among individuals who attended a…
A:
Q: The following data were obtained from a company that manufactures special plastic containers that…
A: Given information: The data represents the observed counts of each of the three 8-hour shifts versus…
Q: Calculate a 95% confidence interval for the difference in true proportion of the carrier bags which…
A: n1 be the carrier bags made from jicama type A =100 n2 be the carrier bags made from jicama type B…
Q: In an experimental study, it was noticed that people who eat more leafy, green vegetables tend to…
A: Given that in an experimental study, its observed that people who eat more leafy , green vegetables…
Q: Based on the data from the concrete test, a production company performs tests on a new accelerator…
A: Given : alpha=0.05, no. of replicates =4 , no of factors =2 we conduct a statistical hypothesis…
Q: are sampled areas of a city. All intersections have approximately equal daily traffic. Ten of the…
A: Mann whitney U test : The distinction between the 2 rank totals is mirrored within the Mann-Whitney…
Q: A group of 10-year-old boys were first ascertained in a camp for diabetic boys. They had their…
A: Given: n=15 The significance level is taken as 0.05.
Q: A manufacturer of automobile products has developed a new wax and is interested in comparing the new…
A: It is tested whether the new wax will protect the car for longer period of time than the standard…
Q: Please calculate Cronbach's alpha.
A: Here Given No of Items=k=23 Variance for total score=s2y = 218.84 ∑Si2 = 218.84
Q: Here is a dataset containing plant growth measurements of plants grown in solutions of…
A: Solution : Given : Dataset of Phragmites australis, a fast-growing non-native grass was grown in a…
Q: Much concern has been expressed regarding the practice of using nitrates as meat preservatives. In…
A: Given data is 7252,6872,9637,6864,9099,5841,8953,7975,7069,7499,7888,8175,7529,8729,7465sample…
Q: In recent years, concerns have been expressed about adverse health effects from amalgam dental…
A: Chi-Square Test of Independence: It is hypothesis testing for independence when there are two…
Q: (a) Use the given data for the treatment group to determine if there is sufficient evidence to…
A: (a) Let μd be the mean difference of selenium supplement for initial and 9-day of treatment group.…
Q: .A study was conducted to determine the level of cyanide in 20 exposed spot (soil and water) within…
A:
Q: In an attempt to measure the effects of acid rain, researchers measured the pH (7 is neutral and…
A:
Q: John investigated the quantitative determination of Cr in high-alloy steels by a potentiometric…
A: The results for the analysis of a single reference steel is given. Let xi denote the sample…
Q: A recent study examined the effects of carbon monoxide exposure to a group of construction workers.…
A: Let us first test whether the construction workers symptoms and shift they worked are independent,…
Q: Given that the residual for each observation () is H; > 0, this means that Select one: O a.…
A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts. In case…
Q: Imagine a study where all our data (x, y) falls perfectly on a flat and straight horizontal line. If…
A: Observation table: from above table we have, Sxx = 54 Syy= 220 Sxy = 42 Correlation coefficient…
Q: Radiation in Baby Teeth Listed below are amounts of strontium-90 (in millibecquerels, or mBq) in a…
A: In this case we need to construct the boxplot for the amounts of strontium-90 and also identify the…
Q: A deficiency of the trace element selenium in the diet can negatively impact growth, immunity,…
A: a) Conclusion: Reject H0. We have convincing evidence that the mean selenium concentration is…
Q: In a detailed study of the productivity of a laboratory, the age distribution of its workers was…
A: The mean for the given distribution is calculated as follows: Mean =∑fx ∑f = 4560.5…
Q: integrate the following
A:
Q: In a certain city, the daily consumption of electricpower in millions of kilowatt-hours can be…
A: The random variable X is said to follow gamma distribution if its probability density function is…
Q: 11.92 What test can be performed to assess the relationship between weight and HgbA1c at the initial…
A: Note** As per guidelines we can answer only one part at a time. Please repost other parts again.…
Q: In elderly Americans, a new blood test is being developed to diagnose a particular disease. Suppose…
A: According to the provided information, Sensitivity is 80% and specificity is 70%. True Positive (A)…
Q: In an attempt to measure the effects of acid rain, researchers measured the pH (7 is neutral and…
A: Five number summary,Box and Whisker Plots…
Q: About 30% of the population cannot detect any odor when they sniff the steroid androstenone, but…
A: From the given information, the alternative hypothesis is that the p is not equal to 0.5. Null…
Q: The accompanying data on number of cell phon minutes used in one month are consistent with summar…
A: Measure of center is a descriptive measure that attempts to describe a set of data by identifying…
Q: It is hypothesized that there are fluctuations in norepinephrine (NE) levels which accompany…
A: (a). Test whether MHPG significantly predict affect or not: The investigator is interested to test…
Q: A group of 10-year-old boys were first ascertained in a camp for diabetic boys. They had their…
A: The provided data are shown in the table below, along with the corresponding ranks for the variables…
Q: Researchers interested in lead exposure due to car exhaust sampled the blood of 52 police officers…
A: Note, Since you have asked multiple question, we will solve the first question for you. If you want…
Q: The sulfate ion concentration in natural water can be determined by measuring the turbidity that…
A: Given : The sulfate ion concentration in natural water can be determined by measuring the turbidity…
Q: Which of following is not true about the alpha level?
A: The alpha level is the critical value or the probability to reject the null hypothesis is TRUE. The…
Q: Identify the study design best suited for the article: Antibacterial effects of Psidium guajava…
A: Hello! As you have posted 2 different questions, we are answering the first question (22). In case…
Q: Listed below are amounts of strontium-90 (in millibecquerels, or mBq) in a simple random sample…
A: Given,sample size(n)=20
Q: The DENR has a new procedure to detect algal bloom in water being tested. This new procedure is…
A: We have to Bayes theorem to find the probability.
Q: The DENR has a new procedure to detect algal bloom in water being tested. This new procedure is…
A:
Q: For the same data set above, if we set our alpha .01, find the critical r from the table:
A: It is given that Number of observations n = 15 SSx = 4, SSy = 25 and SP = 6
Q: A group of 10-year-old boys were first ascertained in a camp for diabetic boys. They had their…
A: Given Information : A group of 10-year-old boys were first ascertained in a camp for diabetic boys.…
Q: Listed below are the measured radiation absorption rates (in W/kg) corresponding to various cell…
A: The descriptive analysis is conducted using EXCEL. The software procedure is given below: Enter the…
Q: The aging Neotropical termites (Neocapritermes taracua) secrete a sticky, blue-colored liquid that…
A: Given : x1= 37.0 n1= 41 x2= 9.0 n2= 40
Q: Below shows the results from comparing the total out-of-pocket costs of prescription drugs (TOTAL…
A: Solution There exists a statistical significance when the null hypothesis is rejected and the null…
Q: rmination of hemoglobin A1c (HgbA1c) was made. HgbA1c (also called glycosylated hemoglobin) is…
A: Given Information : A group of 10-year-old boys were first ascertained in a camp for diabetic boys.…
Q: A small set of data has been collected to explore how much of an effect Thawing Degree Days (TDD)…
A: The dependent variable is TDD. The independent variable is Depth of active layer. We have to test…
Q: Find the mean and variance of sB sdBs , where В, is a Brownian motion
A:
Q: A deficiency of the trace element selenium in the diet can negatively impact growth, immunity,…
A: Given table provides the selenium concentration for treatment group and control group at two time…
Q: How could the researchers design an experiment to determine the effects of flavanol on blood flow…
A: Hypothesis testing is defined as testing the population parameter on the basis of sample evidence…
Step by step
Solved in 2 steps with 2 images
- The DENR has a new procedure to detect algal bloom in water being tested. This new procedure is important because, it could be used to detect three different contaminants-organic pollutants, volatile solvents, and chlorinated compounds. The department claims that it can detect high levels of organic pollutants with 99.95% accuracy, volatile solvents with 99.70% accuracy, and chlorinated compounds with 89.70% accuracy. If an algal bloom is not present, the test does not signal. Samples are prepared for the calibration of the test and 60% of them are contaminated with organic pollutants, 27% with volatile solvents, and 13% with traces of chlorinated compounds. A test sample is selected randomly. Denote as follows: S= signal, 0 = organic pollutants, V = volatile solvents, C = chlorinated compounds. If the test signals, what is the probability that chlorinated compounds are present? (Show complete solution in your answer sheet) O a. P(C|S) = 0.1184 O b. P(C|S) = 0.1386 O c. None among the…The DENR has a new procedure to detect algal bloom in water being tested. This new procedure is important because, it could be used to detect three different contaminants-organic pollutants, volatile solvents, and chlorinated compounds. The department claims that it can detect high levels of organic pollutants with 99.95% accuracy, volatile solvents with 89.70% accuracy, and chlorinated compounds with 99.70% accuracy. If an algal bloom is not present, the test does not signal. Samples are prepared for the calibration of the test and 60% of them are contaminated with organic pollutants, 27% with volatile solvents, and 13% with traces of chlorinated compounds. A test sample is selected randomly. Denote as follows: S = signal, O = organic pollutants, V = volatile solvents, C = chlorinated compounds. If the test signals, what is the probability that chlorinated compounds are present? (Show complete solution in your answer sheet) O a. P(CIS) = 0.1386 Ob.P(C|S) = 0.1184 OC. None among the…Special dyes have been developed that only bind to DNA. The intensity of the color is directly related to the quantity of DNA present in the cell. A haploid cell would have a “low” amount of color, a cell in G1 would have a “medium” amount of color, and a cell in M phase would have a “high” amount of color. Is this sort of assessment quantitative, qualitative or semi-quantitative? Justify your reasoning.
- ABC Textiles, Inc. has a textile production facility located in Palm City, FL. It lies along a river that is used for drinking water for the surrounding town and is therefore tested regularly for chemical contaminants according to EPA standards. There is also a recreational beachfront with swimming and boating located ½ mile downstream of the plant. Over the last ten years, the incidence of a skin reaction called allergic dermatitis has increased dramatically for swimmers at the recreational beachfront. Due to public concern, the local water utility began checking for elevated levels of several pollutants that cause skin reactions. Over the course of a year, they collected 45 water samples from a location adjacent to the output of the industrial plant. These samples were tested and elevated levels of chromium were identified. The EPA’s Maximum Contaminant Level (MCL) for chromium is 0.1 mg/L. With the knowledge that chromium pollution can result from fabric dyeing within textile…ABC Textiles, Inc. has a textile production facility located in Palm City, FL. It lies along a river that is used for drinking water for the surrounding town and is therefore tested regularly for chemical contaminants according to EPA standards. There is also a recreational beachfront with swimming and boating located ½ mile downstream of the plant. Over the last ten years, the incidence of a skin reaction called allergic dermatitis has increased dramatically for swimmers at the recreational beachfront. Due to public concern, the local water utility began checking for elevated levels of several pollutants that cause skin reactions. Over the course of a year, they collected 45 water samples from a location adjacent to the output of the industrial plant. These samples were tested and elevated levels of chromium were identified. The EPA’s Maximum Contaminant Level (MCL) for chromium is 0.1 mg/L. With the knowledge that chromium pollution can result from fabric dyeing within textile…ABC Textiles, Inc. has a textile production facility located in Palm City, FL. It lies along a river that is used for drinking water for the surrounding town and is therefore tested regularly for chemical contaminants according to EPA standards. There is also a recreational beachfront with swimming and boating located ½ mile downstream of the plant. Over the last ten years, the incidence of a skin reaction called allergic dermatitis has increased dramatically for swimmers at the recreational beachfront. Due to public concern, the local water utility began checking for elevated levels of several pollutants that cause skin reactions. Over the course of a year, they collected 45 water samples from a location adjacent to the output of the industrial plant. These samples were tested and elevated levels of chromium were identified. The EPA’s Maximum Contaminant Level (MCL) for chromium is 0.1 mg/L. With the knowledge that chromium pollution can result from fabric dyeing within textile…
- ABC Textiles, Inc. has a textile production facility located in Palm City, FL. It lies along a river that is used for drinking water for the surrounding town and is therefore tested regularly for chemical contaminants according to EPA standards. There is also a recreational beachfront with swimming and boating located ½ mile downstream of the plant. Over the last ten years, the incidence of a skin reaction called allergic dermatitis has increased dramatically for swimmers at the recreational beachfront. Due to public concern, the local water utility began checking for elevated levels of several pollutants that cause skin reactions. Over the course of a year, they collected 45 water samples from a location adjacent to the output of the industrial plant. These samples were tested and elevated levels of chromium were identified. The EPA’s Maximum Contaminant Level (MCL) for chromium is 0.1 mg/L. With the knowledge that chromium pollution can result from fabric dyeing within textile…ABC Textiles, Inc. has a textile production facility located in Palm City, FL. It lies along a river that is used for drinking water for the surrounding town and is therefore tested regularly for chemical contaminants according to EPA standards. There is also a recreational beachfront with swimming and boating located ½ mile downstream of the plant. Over the last ten years, the incidence of a skin reaction called allergic dermatitis has increased dramatically for swimmers at the recreational beachfront. Due to public concern, the local water utility began checking for elevated levels of several pollutants that cause skin reactions. Over the course of a year, they collected 45 water samples from a location adjacent to the output of the industrial plant. These samples were tested and elevated levels of chromium were identified. The EPA’s Maximum Contaminant Level (MCL) for chromium is 0.1 mg/L. With the knowledge that chromium pollution can result from fabric dyeing within textile…radon is a colorless, odorless gas that is naturally released by rocks and soils and may concentrate in tightly closed houses. because radon is slightly radioactive, there is some concern that it may be a health hazard. radon detectors are sold to homeowners worried about this risk, but the detectors may be inaccurate. university researchers placed 12 detectors in a chamber where they were exposed to 105 picocuries per liter (pci/l) of radon over 3 years. here are the readings given by the detectors:91.9 97.8 111.4 112.3 105.4 85.0 103.8 89.6 96.6 109.3 104.8 91.7 Assume (unrealistically) that you know that the standard deviation of readings for all detectors of this type is σ = 9. a. Give the 95% confidence interval for the mean reading μ for this type of detector. b. Is there significant evidence at the 5% level that the mean reading differs from the true value 105? State hypotheses and base a test on your confidence interval from (a). c. Calculate the power of this test against the…
- There are three types of contaminants that spoils water. Organic pollutants (0), volatile solvents (V), and chlorinated compounds (C). A new analytical method to detect (D) contaminants in water is being tested. The makers of the test claim that it can detect high levels of organic pollutants with 98% accuracy, volatile solvents with 99% accuracy, and chlorinated components with 89% accuracy. If a pollutant is not present, the test does not signal. Samples are prepared for the calibration of the test and 60% of them are contaminated with organic pollutants, 27% with volatile solvents, and 13% with traces of chlorinated compounds. A test sample is selected randomly. (a) What is the probability that the test will not signal? (b) If the test signals, what is the probability that chlorinated compounds are present? (c) If the test does not signal, what is the probability that chlorinated compounds are present? Note: Use the notations in the brackets to describe the events.DDT (dichlorodiphenyltrichloroethane) was used extensively from 1940 to 1970 as an insecticide. It still sees limited use for control of disease. But DDT was found to be harmful to plants and animals, including humans, and its effects were found to be lasting. The amount of time that DDT remains in the environment depends on many factors, but the following table shows what can be expected of 200 kilograms of DDT that has seeped into the soil. t = time in yearssince application D = DDT remaining,kilograms 0 200.00 1 190.00 2 180.50 3 171.48 (a) Show that the data are exponential. The ratio from year 0 to year 1 is ______ , from year 1 to year 2 is ____ , and from year 2 to year 3 is_____ (rounded to two decimal places). Because these successive ratios are all , a) different b)the same , the data are exponential.Arsenic is a naturally occurring chemical that can enter groundwater through eroding granite or from a burned forest. A health organization recommends drinking water should contain no more than 10 parts per billion (ppb) of arsenic. A company produces filters to clean arsenic from private wells that could be affected by the groundwater. The company wants to investigate the effectiveness of a new filter compared to that of an older filter. They will test the filters on a field that is bordered on one side by a granite ledge and on the other side by a burned forest. The field is divided into 88 square plots of equal size, and a well to collect groundwater is drilled in the center of each plot. One filter will be used in each well. The following diagram shows the placement of the wells in the field. The company will use four of each type of filter to conduct the investigation. A randomized block design will be used. (a) Assuming there is a difference in the effectiveness of the two…