Answer to Question #42173 in Statistics and Probability for rosy

Question

1. A genetics expert has been studying genetic disorders for children of certain couples. In a study of 200 births, 25 of them contain the gene for this disorder.
a. Find a 95% confidence interval for the estimate of the population proportion.
b. What is the margin of error for this confidence interval?
c. Interpret this confidence interval verbally.
d. a "not-so" famous genesist told you that he felt that the population proportion is 20%. What would you say to this person and why?

2. Among those who take the SAT, 21 are randomly selected. This sample group has a mean score of 520 and a sample standard deviation of 130 on the verbal portion of the exam.
a. If you are to find a confidence interval for the population mean, what distribution would you use and why?
b. Find a 99% confidence interval estimate for the population