Question
In: Statistics and Probability
In a certain community, 4 percent of all adults over the age of 50 have tuberculosis...
In a certain community, 4 percent of all adults over the age of 50 have tuberculosis (T.B.). A health service in this community correctly diagnoses 98 percent of all persons with T.B. as having the disease, and incorrectly diagnoses 3 percent of all persons without T.B. as having the disease. Find the probabilities that, a) the community health service will diagnose an adult over 50 as having T.B., b) a person over 50 diagnosed by the health service as having T.B. actually has the disease.
Solutions
orchestra answered 1 year agoRelated Solutions
In a certain community, 4 percent of all adults over the age of 50 have tuberculosis...
In a certain community, 4 percent of all adults over the age of
50 have tuberculosis (T.B.). A health service in this community
correctly diagnoses 98 percent of all persons with T.B. as having
the disease, and incorrectly diagnoses 3 percent of all persons
without T.B. as having the disease. Find the probabilities
that,
a) the community health service will diagnose an adult over 50
as having T.B.,
b) a person over 50 diagnosed by the health service as having...
A recent survey found that 70% of all adults over 50 wear glasses for driving. In...
A recent survey found that 70% of all adults over 50 wear
glasses for driving. In a random sample of 10 adults over 50, what
is the probability that exactly six wear glasses?
Please round answer to the ten-thousandths place (4
places).
In a certain region, 20% of people over age 50 didn't graduate from high school. We...
In a certain region, 20% of people over age 50 didn't graduate
from high school. We would like to know if this percentage is the
same among the 25-30 year age group. Use critical values to exactly
3 decimal places.
(a) How many 25-30 year old people should be surveyed in order to
estimate the proportion of non-grads to within 7% with 95%
confidence?
(b) Suppose we wanted to cut the margin of error to 4%. How many
people should...
In a certain region, 24% of people over age 50 didn't graduate from high school. We...
In a certain region, 24% of people over age 50 didn't graduate
from high school. We would like to know if this percentage is the
same among the 25-30 year age group. Use critical values to exactly
3 decimal places.
(a) How many 25-30 year old people should be surveyed in order to
estimate the proportion of non-grads to within 6% with 99%
confidence?
(b) Suppose we wanted to cut the margin of error to 2%. How many
people should...
A recent survey found that 63% of all adults over 50 wear glasses for driving. Ia...
A recent survey found that 63% of all adults over 50 wear
glasses for driving. Ia random sample of 100 adults over 50 was
selected., a). what is the expected value and standard deviation of
the number of adults over 50 who wear glasses? b). Find the
probability that more than 60 of the adults over 50 wear glasses.
Hint: using normal distribution to approximate binomial
distribution.
It is believed that 1/4 of adults over 50 years old graduated from high school. We...
It is believed that 1/4 of adults over 50 years old graduated
from high school. We want to see if the percentage is the same for
30 year olds. How many should we survey in order to estimate the
proportion of non-grads within 0.06 with 90 % confidence? Suppose
we have no idea of the % of non-grads, what would be the "n"
value?
A stock had returns of 10 percent, -4 percent, 4 percent, and 18 percent over the...
A stock had returns of 10 percent, -4 percent, 4 percent, and 18
percent over the past four years. What is the standard deviation of
these returns?
8. Tuberculosis The genus mycobacterium contains over 50 species with several human pathogens of concern. Mycobacteria...
8. Tuberculosis
The genus mycobacterium contains over 50 species with
several human pathogens of concern.
Mycobacteria are distinguishable from other types of bacteria by
the presence of wax layers and
high molecular weight fatty acids (mycolic acids). This complex,
external structure offers
protection from acids, drying and some germicides. In fact,
mycobacteria are also referred to as
acid-fast bacilli because acid treatments will not result in
decolorization during staining.
One of the mycobacteria species of medical interest is
Mycobacterium tuberculosis,...
A community health nurse is cut is discussing the self concept characteristics with middle age adults...
A community health nurse is cut is discussing the self
concept characteristics with middle age adults that occur during
this stage of life. Discuss 3 characteristics for self concept of
concern for this stage of life, depression, irritability, and
menopause.
a community health nurse is discussing body image with middle age adults. discuss the characteristics for...
a community health nurse is discussing body image with
middle age adults. discuss the characteristics for body image sex
drive, churned in physical appearance, and women: symptoms of
menopause can represent as new interest in intimacy, or loss of the
reproductive role or femininity
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