1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Shkiper50 [21]
3 years ago
8

A large number of disease-free individuals were enrolled in a study

Biology
1 answer:
Nuetrik [128]3 years ago
3 0

Answer:

a,Answer: Type I right censoring, censoring time = 60.

b.This is called an Interval censoring,

c.this is called Random censoring because the year in consideration was chosen at random, censoring time = 61.

d.The observations are left truncated respectively at age 30, 40, 50 and 42.

e.L\alpha \frac{S(60)}{S(30)} *\frac{S(52)-S(55)}{S(40)} *\frac{S(61)}{S(42)} *\frac{S(55)}{S(50)}

Explanation:

a) A healthy individual, enrolled in the study at age 30, never developed

breast cancer during the study.

Answer: Type I censoring, censoring time = 60.

(b) A healthy individual, enrolled in the study at age 40, was diagnosed

with breast cancer at the fifth exam after enrollment (i.e., the disease

started sometime between 12 and 15 years after enrollment).

THis is called an Interval censoring,

if the clinical exams is conducted every three years , then 3*4=12, and 3*5=15

add this to 40 years respectively, we have

censoring time = (52, 55]

c) A healthy individual, enrolled in the study at age 50, died from a

cause unrelated to the disease (i.e., not diagnosed with breast cancer

at any time during the study) at age 61.

this is called Random censoring because the year in consideration was chosen at random, censoring time = 61.

(d) An individual, enrolled in the study at age 42, moved away from

the community at age 55 and was never diagnosed with breast cancer

during the period of observation.

Random censoring, censoring time = 55.

The observations are left truncated respectively at age 30, 40, 50 and 42.

e.  Confining your attention to the four individuals described above,

write down the likelihood for this portion of the study.

L\alpha \frac{S(60)}{S(30)} *\frac{S(52)-S(55)}{S(40)} *\frac{S(61)}{S(42)} *\frac{S(55)}{S(50)}  

the above represent the likelihood

You might be interested in
A nurse is caring for a client with the diagnosis of schizophrenia. during assessment the nurse identifies both positive (type i
aleksandr82 [10.1K]
There is no options to select
3 0
3 years ago
What problem is solved by the linnaean system of classification
MissTica

Due to the linneaus system of classification scientist were able to identify  organism name , group via standardized system . They have found similarities  in the organism  like DNA / RNA ( genetic composition), embryonic development  etc . so that they can study a organism completely . With the help of this system of classification  scientist were able to give a particular name to a organism which is standardrized in the whole universe. It makes easier to all to identify an organism , otherwise different places have different name for a particular species.

4 0
2 years ago
Explain the differences between the human egg and the chicken egg. Use what you see in the eggs and what you know about the way
Lady bird [3.3K]
So chickens are eateble but not humans unless theyre cannibalchick eggs are hard and theyre dont stay in mother stomach for long 
8 0
3 years ago
Read 2 more answers
During the process of _____, two rails or sides break apart and attract new nucleotide bases to form a new and complete strand.
Brilliant_brown [7]
A bond, called the glycosidic bond, holds the base to the sugar and the 3′-5′ ("three prime-five prime") phosphodiester bond holds the individual nucleotides together. Nucleotides are joined from the 3′ carbon of the sugar in one nucleotide to the 5′ carbon of the sugar of the adjacent nucleotide. The 3′ and the 5′ ends are chemically very distinct and have different reactive properties. During DNA replication, new nucleotides are added only to the 3′ OH end of a DNA strand. This fact has important implications for replication.
3 0
2 years ago
Read 2 more answers
The kinesthetic system is the sensory system that involves ___________.
irina1246 [14]

The correct answer is option c. the sensory receptors in the vestibular sacs.

The kinesthetic system is involved in the movement and the balancing of the body. The mechanoreceptors present in the inner ear helps in determining the balance and the maintenance of the postures.

The vestibular sac have utricle and saccule, which help in the detection of the changes in linear acceleration. The semilunar canal present in inner ear respond to angular moments

6 0
3 years ago
Read 2 more answers
Other questions:
  • NEED HELP ASAP!!!!!!!!!!!
    13·1 answer
  • Is most of South America's trees tropical trees?
    15·1 answer
  • 5. The largest mass extinction event in the history of the Earth occurred at the end of the _______ period. A. Devonian B. Ordov
    11·1 answer
  • Write a 600 word report discussing nuclear reactors. The report should include a description of the way a reactor works and the
    9·1 answer
  • When a rigid body rotates about a fixed axis all the points in the body have the same angular acceleration.?
    9·1 answer
  • What pigment do plants use as a catalyst for photosynthesis?
    14·2 answers
  • What is a gene? on edge
    13·1 answer
  • Las bacterias son capaces de transferir plasmido De una celula ah otra Mediante la estructura bacteriaNa Cual es esa estructura
    13·1 answer
  • List 5 characteristics that genes code for.
    14·1 answer
  • 3. Algae makes energy-rich carbon compounds through
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!