Question

A 2011 article in the British Medical Journal attempts to
elucdiate Bayes' Rule for the medical profession. It's well worth
reading and has some illuminating graphics. In this exercise you
will confirm a result stated in the article. Useful terminology:
The sensitivity of a test for a medical condition is the proportion
of correctly diagnosed patients among those who have the condition.
The specificity of the test is the proportion of correctly
diagnosed patients among those who do not have the condition. Read
those definitions a couple of times and note that a good test
should have high values of both sensitivity and specificity. In the
section Special Cases, the authors consider a 45-year-old woman who
has a 1% chance of getting breast cancer in the subsequent five
years. The article says, "The sensitivity of routine screening
mammography ranges from 71% to 96% and the specificity ranges from
94% to 97%. Using values of 80% for sensitivity and 96% for
specificity, a positive test increases the probability to 17%." For
this problem, show your work in finding each probability and box
the final decimal answer.

(iv) the chance that the woman's test result is negative

Answer #1

If sensitivity = 80%,specificity = 96%,prevalence = 17% as given

so

chance that the woman's test result is negative = NPV =

(0.96*(1-0.17))/((1-0.8)*0.17+0.96*(1-0.17))

=0.9590756

chance that the woman's test result is negative = PPV =

=0.8*0.17/(0.8*0.17+(1-0.96)*(1-0.17))

=0.8037825

A 2011 article in the British Medical Journal attempts to
elucdiate Bayes' Rule for the medical profession. It's well worth
reading and has some illuminating graphics. In this exercise you
will confirm a result stated in the article. Useful terminology:
The sensitivity of a test for a medical condition is the proportion
of correctly diagnosed patients among those who have the condition.
The specificity of the test is the proportion of correctly
diagnosed patients among those who do not have...

The sensitivity of a medical test refers to the test’s ability
to correctly detect ill patients who have the condition.
Mathematically, sensitivity is equivalent to the probability that
the test indicates a patient is ill given that the patient is ill.
The specificity of a medical test refers to the test’s ability to
correctly detect that a healthy patient does not have the
condition. Mathematically, specificity is equivalent to the
probability that the test indicates the patient is healthy given...

Suppose that a medical test run on 372 people resulted in 38
positive results. Of those, 22 people were eventually confirmed to
have the illness. Among the people who tested negative, 3 were
eventually diagnosed through other means, and the rest were
healthy. Find the sensitivity of the test, the specificity of the
test, and the positive and negative predictive values. The positive
predictive value is the probability that a person is ill given that
they tested positive, and the...

Sensitivity and specificity essential characteristics of medical
tests. Sensitivity is the probability that the test will indicate
“disease” given that the individual actually has the disease, and
specificity is the probability that the test will indicate “no
disease” given that the individual does not have the disease.
Answer the following questions for a test with sensitivity 75% and
specificity 99%. Let p denote the prevalence of the disease (i.e.,
proportion of the population with the disease).
(a) For p =...

Diagnostic tests of medical conditions can have several types of
results. The test result can be positive or negative, whether or
not a patient has the condition. A positive test (+) indicates that
the patient has the condition. A negative test (−) indicates that
the patient does not have the condition. Remember, a positive test
does not prove the patient has the condition. Additional medical
work may be required. Consider a random sample of 200 patients,
some of whom have...

Question 1.
The main purpose of screening is to identify symptomatic disease
using tests, exams, or other procedures.
True
False
Question 2.
The detectable pre-clinical phase of a disease starts when the
disease can be identified by a screening test and ends when the
disease produces symptoms.
True
False
Question 3
.Diseases that are appropriate for screening…
a.
Have serious consequences
b.
Have a treatment that is more effective at an earlier stage
c.
Have a detectable preclinical phase that...

Statistics - Diagnostic tests of medical conditions.
Rules:
Turn in one set of solutions with names of all participating
students in the group.
Graphs should be neat, clean and well-labeled. Explain how you
arrived at the conclusions (functions/formulas used in
calculations.)
“Explanations” and answers should given be given in the form of
complete sentences.Since I give partial credit on the projects you
should show your work so that some partial credit can be assigned
if your answer is incorrect.
Part...

In Conrad’s article, Illness and the Internet: From
Private to Public Experience, the authors note that with the advent
of social media, communication has:A.destroyed all possibility for one on one interactionsB.increased a need to belongC.increased and brought new challenges for online interactionD.totally left out the elderlyIn Young and Disabled, Stephanie McCarty, who has
Multiple Sclerosis noted that she was frustrated because people
often:A.stare too muchB.ask her what she does for a livingC.pretend she's not thereD.none of the aboveIn At the...

Please summarize the below article in approximately 100
words:
Monumental function in British Neolithic burial practices
Ian Kinnes
The high-risk rate of survival for the non-megalithic series of
Neolithic funerary monuments, recently re-emphasized by Piggott
(1973: 34), introduces a further variable into the deductive study
of burial practices. In Britain and Europe the overall distribution
of monumental forms present both lacunae and a marked preponderance
of cairns over earthen mounds which are in ill accord with the
known or predicted...

Assignment: What are the main arguments in the
article?
Please answer within 5 hours. It is extremely
urgent!!!!!!!!!!!!!!!!!!!!!!!!
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
BIOETHICS.
Bioethics as a field is relatively new, emerging only in the
late 1960s, though many of the questions it addresses are as old as
medicine itself. When Hippocrates wrote his now famous dictum
Primum non nocere (First, do no harm), he was grappling
with one of the core issues still facing human medicine, namely,
the role and duty of the...

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