Monday
July 28, 2014

Homework Help: Statistics

Posted by Belinda on Monday, February 7, 2011 at 12:53pm.

One of my classmates ask this question and it wasn't answered so now I am asking it and of course we are all struggling with no strong Math background
Case 6.4 Maternal Serum Screening Test for Down syndrome
Please keep in mind that I do not have a Math back ground so this is brand new to me and like a foreign language that I have never seen nor heard spoken before. Thank you for your help in advance.

Pregnant women are screened for a birth defect called Down syndrome. Down syndrome babies are mentally and physically challenged. Some mothers choose to abort the fetus when they are certain that their baby will be born with the syndrome. The most common screening is maternal Serum screening, a blood test that looks for markers in the blood to indicate whether the birth defects may occur. The false- positive and false- Negative rates vary according to the mother.
Mothers age false positive rate false negative rate
Under 30 .04 .376
30-34 .082 .290
35-37 .178 .269
Over 38 .343 .029
The probability that the baby has Down syndrome is primarily a function of the motherís age. The probabilities are listed here.
Age Probability of Down Syndrome
25 1/1300
30 1/900
35 1/350
40 1/100
45 1/25
49 1/12
a) For each of the ages 25, 30, 35, 40, 45, and 49, determine the probability of Down syndrome if the maternity serum screening produces a positive result.
b) Repeat the negative result

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Math - My son has to do a venn diagram. He has chosen fruits and vegetables. The...
Science - What is the average summer temperature in the desert biome? Select one...
algebra - thank everyone that site helped but now i just have to practice. for ...
Math HELPPP - In a survey of 2000 adults 50 years and older of whom 40% were ...
Algebra - I posted this earlier but it didn't get answered. So I'm posting it ...
Math - While spending 10 weeks at a university in Germany, Ayesha frequently had...
Math - Thanks a million to Amy who answered my question earlier today. I have ...
HISTORY - I am working on a paper for my college HIS class, I have found ...
Statistics - 1. z test 2. t test for independent samples, and 3. t test for ...
Statisic for managers - Brand new to statistics ,no strong math background ...

Search
Members