Math (Statistics)
posted by Edward .
How do I go about tackling this problem?
The American Medical Association wishes to determine the percentage of obstetricians who are considering leaving the profession becaose of the rapidly increasing number of lawsuits against obstetricians. How large a sample should be taken to find the answer to within + or = 3% at the 95% confidence level?
Try this formula:
n = [(zvalue)^2 * p * q]/E^2
Note: I'm using * to mean multiply.
With your values:
= [(1.96)^2 * .5 * .5]/.03^2
Note: Round to the next highest whole number.
Information: n = sample size needed; .5 for p and .5 for q are used if no value is stated in the problem. E = maximum error, which is .03 (3%) in the problem. Zvalue is found using a ztable (for 95%, the value is 1.96).
I hope this will help.

323e
Respond to this Question
Similar Questions

Math (typo in first)
How do I go about tackling this problem? (I made a problemmodifying typo in the first) The American Medical Association wishes to determine the percentage of obstetricians who are considering leaving the profession becaose of the 
Statistics
Can you please help with this question. The only thing that I have come up thus far is that I am using the z critical value because I am estimating a population proportion. Am I on the right track? 
Statistics
The American Veterinary Association claims that the annual cost of medical care for dogs averages $100, with a standard deviation of $30, and for cats averages $120, with a standard deviation of $35. A)Whats the expected difference … 
statistics
many states are considering steps that would help them collect sales taxes on items purchased through the internet. how many randomly selected sales transactions must be surveyed to determine the percentage that transpired over the … 
law
A/an __________ is an occupation requiring knowledge of the arts or sciences and advanced study in a specialized field, such as law. (Points: 5) regulation profession rule association is it "profession" 
statistics
a pizza shop owner wishes to find the 95% confidence interval of the true mean cost of a large plain pizza. how large should the sample be if she wishes to be accurate to within $0.15? 
Statistics
Many states are carefully considering steps that would help them collect sales taxes on items purchased through the Internet. How many randomly selected sales transactions must be surveyed to determine the percentage that transpired … 
American Government
Which of the following interest groups is considered to have the most influence over Congress? 
Microeconomics
Medical doctors earn higher incomes than people who have a Ph. D in economics. This is partly because A. Medical doctors are more likely to face malpractice lawsuits. B. The costs of receiving necessary medical education are higher … 
Microeconomics
Medical doctors earn higher incomes than people who have a Ph.D. in economics. This is partly because A. Medical doctors are more likely to face malpractice lawsuits. B. The costs of receiving necessary medical education are higher. …