Question

In: Statistics and Probability

To reduce laboratory​ costs, water samples from twotwo public swimming pools are combined for one test...

To reduce laboratory​ costs, water samples from twotwo public swimming pools are combined for one test for the presence of bacteria. Further testing is done only if the combined sample tests positive. Based on past​ results, there is a 0.0040.004 probability of finding bacteria in a public swimming area. Find the probability that a combined sample from twotwo public swimming areas will reveal the presence of bacteria. Is the probability low enough so that further testing of the individual samples is rarely​ necessary?

The probability of a positive test result is ​(Round to three decimal places as​ needed.)

Solutions

Expert Solution

orchestra answered 1 year ago
Next > < Previous

Related Solutions

To reduce laboratory​ costs, water samples from five public swimming pools are combined for one test...
To reduce laboratory​ costs, water samples from five public swimming pools are combined for one test for the presence of bacteria. Further testing is done only if the combined sample tests positive. Based on past​ results, there is a 0.007 probability of finding bacteria in a public swimming area. Find the probability that a combined sample from five public swimming areas will reveal the presence of bacteria. Is the probability low enough so that further testing of the individual samples...
Laboratory Test: The patient was then subjected to a 2-hour water deprivation test followed by another...
Laboratory Test: The patient was then subjected to a 2-hour water deprivation test followed by another blood chemistry profile and urinalysis. Of note, serum osmolality increased to 329mOsm/kg while serum ADH, urine specific gravity and urine osmolality remained unchanged. Questions to Consider: Why did the patient’s serum osmolality increase? Follow-up and Diagnosis: The patient was then injected with a drug called DDAVP (desmopressin) which mimics the actions of ADH. One hour after the injection, serum osmolality decreased to 292mOsm/kg and...
The following laboratory tests are performed a- Setting time test of cement paste samples b- Compressive...
The following laboratory tests are performed a- Setting time test of cement paste samples b- Compressive Strength of mortar cubes c- What cement component (C2S, C3S etc.) plays most important role in each of the tests and why? d- Which cement type will give you best and worst results for each of the tests? For compressive strength assume that it was run 3 days after casting For a and b what are the significance and use of each of these...
Consider the following data for a clinical laboratory: Activity Annual Costs Cost Driver Test A Test...
Consider the following data for a clinical laboratory: Activity Annual Costs Cost Driver Test A Test B Test C Test D Total Units Allocation Receive specimen $             10,000 Number of tests 2,000 1,500 1,000 500 5,000 $            2.00 Equipment set-up                  25,000 Number of minutes per test 5 5 10 10 30 $      833.33 Run test               100,000 Number of minutes per test 1 5 10 20 36 $ 2,777.78 Record results                  10,000 Number of minutes per test 2 2 2 4 10              1,000 Transmit...
What makes a dependent samples t test different from a one-sample t test? In what way...
What makes a dependent samples t test different from a one-sample t test? In what way are these tests similar?
One-sample t-test Independent samples t-test Paired samples t-test One-way ANOVA Correlation Simple linear regression Chi-square test...
One-sample t-test Independent samples t-test Paired samples t-test One-way ANOVA Correlation Simple linear regression Chi-square test of independence/association ______ Statistical test used to compare means of a continuous variable between >2 groups ______   Statistical test used to examine whether 2 categorical variables are independent ______   Statistical test used to compare a sample mean to a population mean (when the         population standard deviation is known) ______   Statistical test used to compare means of a continuous variable between 2 groups    ...
1.Water samples were taken from water used for cooling as it was being discharged from a...
1.Water samples were taken from water used for cooling as it was being discharged from a power plant into a river. It has been determined that as long as the mean temperature of the discharged water is at most 150 F, there will be no negative impact on the river's ecosystem. To investigate whether a plant is in compliance with regulations that prohibit a mean discharge water temperature above 150 F, researchers took 50 water samples at randomly selected times...
Laboratory compaction test results for a cohesive soil are given in the following table: Water Content...
Laboratory compaction test results for a cohesive soil are given in the following table: Water Content (%) Dry Density (pcf) 12.0 116.2 13.6 117.6 14.8 117.9 16.1 116.5 17.2 113.6                                                                                                                Plot Diagram with labels and sample test labels Specifications call for a fill dry density of 114 pcf and further require that the fill be compacted at optimum water content for the field compactive effort. For the following field density test results on a fill, explain how you alter...
2.2. Indicate which test (paired samples (ie dependent) t-test, independent two samples t-test, one-sample t-test, independent...
2.2. Indicate which test (paired samples (ie dependent) t-test, independent two samples t-test, one-sample t-test, independent samples z-test) is most appropriate for the following situations : A. Comparison of weight gain of two groups of 18 cows where one group was raised following standard practices and the other group was raised following “organic” standards. B. Comparison of scores on a fitness test of Olympic-class distance runners (n=20) with the national average score of people of a similar age range (22-31...
indicate the formulas for finding the degrees of freedom for: One-sample t-test Two independent-samples t-test Paired-samples...
indicate the formulas for finding the degrees of freedom for: One-sample t-test Two independent-samples t-test Paired-samples t-test
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT