homework help
Homework Answers
Microbiology- Phenol Red Broth
Suppose you inoculate a PR broth with a slow-growing fermenter. After 48 hours, you see slight turbidity but score it as (-/-). Is this result a false positive or afalse negative? Is this a result of poor specificity or poor sensitivity of the test system?
Assuming, as in Question 1. you tested an organism using PR Glucose and PR Base broths,...
Assuming, as in Question 1. you tested an organism using PR Glucose and PR Base broths, which of the combi nations of results in the following table would be reliable. Interpret each of the combinations and explain how the results might be obtained. PR PR Base Reliable Y/N Glucose A/G AIG Interpretation fermentation with acid and gas end products in PR base Hermentation with acid end products In PR glucoses no ferm. in Pr buse fermentation w/ acid s gas...
The DoubleCheckGoldTM HIV 1&2 test has a sensitivity of 99.9% and a specificity of 99.6%. Suppose...
The DoubleCheckGoldTM HIV 1&2 test has a sensitivity of 99.9% and a specificity of 99.6%. Suppose that a particular high-risk population has an HIV prevalence of 10%. a. Suppose that a member of this high-risk population is known to be HIV positive. What is the probability that this person will produce a false negative result using this test? Report the result to the nearest tenth of a percent. b. Compute and interpret the positive predictive value for this test when...
1. Someone new is preparing media for lab and adds buffers to the EMB agar that...
1. Someone new is preparing media for lab and adds buffers to the EMB agar that raise the pH to 7.8. The starting pH of EMB plates should be 6.9 – 7.3. No one is aware of the change. The EMB plates are inoculated for identification of unknown bacteria. After the appropriate incubation time, the results are interpreted. A. Discuss the consequences of the change in starting pH to the interpretation of the results. (The answer is not that no...
Negative predictive value is a probability of not having disease given that you have just tested...
Negative predictive value is a probability of not having disease given that you have just tested negative and is expressed as O a. True negative/(True negative False Positive) O b. True positive/(True positive False Negative) О c. True Negative/(True negative + False Negative) O d. True positive/True positive False Positive) QUESTION 10 Positive predictive value is the probability that subjects with a positive screening test truly have the disease. The equation for positive predictive value is expressed as: O 3....
Epidemiology question 3. ng the screening cut-off point affect sensitivity. specificity, PPV and NPV of the...
Epidemiology question
3. ng the screening cut-off point affect sensitivity. specificity, PPV and NPV of the test? Why? are the respective "costs" ring the screening cut-off point affect the number of false positives and false negatives associated with false positives and false negativesi ? What 5. sensitivity, PPV and NPV of the test? How would you expect raising the cut-off point to 220mg of blood glucose per 100ml to affect the specificity was repeated using the 130mg of blood glucose...
A thousand (1000) passengers in a cruise started having symptoms of a food poisoning after a dinn...
A thousand (1000) passengers in a cruise started having symptoms of a food poisoning after a dinner on the ship. They were rushed to a hospital that was using a relatively new test for Hepatitis A: The following data was available for the researchers: SICK PASSENGERS HEALTHY PASSENGERS TEST POSITIVE 480 TEST POSITIVE 50 TEST NEGATIVE 30 TEST NEGATIVE 440 510 490 Based on the data: Calculate: A) The sensitivity of the test. B) The specificity of the test. C)...
A blood test to diagnose a disease was performed on a number of patients. Given the...
A blood test to diagnose a disease was performed on a number of patients. Given the following data: Number of patients who had a positive test result and had the disease = 1,193 Number of patients = 1,561 Number of patients who had a negative test, and did not have the disease = 253 Number of patients who had a positive test result, but did not have the disease = 58 Number of patients who had a negative test result,...
Chapter 1-Meulth and Disease 15 9. The number of new cases per year is the C...
Chapter 1-Meulth and Disease 15 9. The number of new cases per year is the C specificity is to true negative. D. predictive value is to false negative. 14. What roles do our environment and our genetics C Occurrence D. Mortality rate play in causing disease? Consider examples along the continuum. 15. Compare and contrast clinical and anatomic 10. Heart disease is which of the following? pathology A. B. Polygenic Environment 16. In screening a population for a lethal disease,...
Homework: Section 4.1 Homework Score: 0 of 1 pt 4.1.22 Save 4 of 10 (3 complete)...
Homework: Section 4.1 Homework Score: 0 of 1 pt 4.1.22 Save 4 of 10 (3 complete) HW Score: 20%, 2 of 10 pts Question Help * Refer to the sample data for pre-employment drug screening shown below. If one of the subjects is randomly selected, what is the probability that the test result isa false positive? Who would suffer from a false positive result? Why? Positive test result Drug Use Is Indicated 37 15 Negative test result Drug Use Is...
Assuming, as in Question 1. you tested an organism using PR Glucose and PR Base broths, which of the combi nations of results in the following table would be reliable. Interpret each of the combinations and explain how the results might be obtained. PR PR Base Reliable Y/N Glucose A/G AIG Interpretation fermentation with acid and gas end products in PR base Hermentation with acid end products In PR glucoses no ferm. in Pr buse fermentation w/ acid s gas...
Negative predictive value is a probability of not having disease given that you have just tested negative and is expressed as O a. True negative/(True negative False Positive) O b. True positive/(True positive False Negative) О c. True Negative/(True negative + False Negative) O d. True positive/True positive False Positive) QUESTION 10 Positive predictive value is the probability that subjects with a positive screening test truly have the disease. The equation for positive predictive value is expressed as: O 3....
Epidemiology question
3. ng the screening cut-off point affect sensitivity. specificity, PPV and NPV of the test? Why? are the respective "costs" ring the screening cut-off point affect the number of false positives and false negatives associated with false positives and false negativesi ? What 5. sensitivity, PPV and NPV of the test? How would you expect raising the cut-off point to 220mg of blood glucose per 100ml to affect the specificity was repeated using the 130mg of blood glucose...
Chapter 1-Meulth and Disease 15 9. The number of new cases per year is the C specificity is to true negative. D. predictive value is to false negative. 14. What roles do our environment and our genetics C Occurrence D. Mortality rate play in causing disease? Consider examples along the continuum. 15. Compare and contrast clinical and anatomic 10. Heart disease is which of the following? pathology A. B. Polygenic Environment 16. In screening a population for a lethal disease,...
Homework: Section 4.1 Homework Score: 0 of 1 pt 4.1.22 Save 4 of 10 (3 complete) HW Score: 20%, 2 of 10 pts Question Help * Refer to the sample data for pre-employment drug screening shown below. If one of the subjects is randomly selected, what is the probability that the test result isa false positive? Who would suffer from a false positive result? Why? Positive test result Drug Use Is Indicated 37 15 Negative test result Drug Use Is...
Most questions answered within 3 hours.
-
a radio station transmits at 78.1 mhz. a hz is an inverse
second. how far apart...
asked 9 minutes ago -
Write the equilibrium expression for the dissociation in
water for CH5N, C2H5O2COOH, H3AsO4, KClO2, HC2H2ClO2.
asked 15 minutes ago -
In risk management, insurance is an example of:
Select one:
a. Risk avoidance
b. Risk deflection...
asked 16 minutes ago -
Wildhorse Company follows the practice of pricing its inventory
at the lower-of-cost-or-market, on an individual-item
basis....
asked 51 minutes ago -
3. (10 pts) You grow a corn crop that yields 150 bushels ac-1,
with the following...
asked 39 minutes ago -
7. The term Six Sigma refers to:
Select one:
a. The control limits established in a...
asked 49 minutes ago -
For the following reaction: A(g) + 2 B(g) ⇌ 2 C(g) Calculate the
equilibrium constant K...
asked 51 minutes ago -
Which of the following best describes tidal volume? options:
1.The amount of oxygen in the air...
asked 1 hour ago -
1. Smaller cost distortions occur when the traditional systems'
single indirect-cost rate and the activity-cost-driver rates:...
asked 1 hour ago -
Using either a FMECA approach or some other appropriate RCA
tool, identify five risk treatment actions...
asked 1 hour ago -
If for a test the P-value is between 0.0025 and 0.005, what
conclusion can you draw?...
asked 1 hour ago -
Using Python. Write a function clean2(aList) that takes a list
of integers aList as argument, and...
asked 1 hour ago