a. Suppose you are with a health agency that wants to estimate what percentage of Ohioans really has contracted coronavirus and thus has antibodies. If your agency wants a 2% margin of error at a 95% confidence level, how many people should you have in your study?
Compute the following
necessary, round to the nearest hundredth
a. Suppose you are with a health agency that wants to estimate what percentage of Ohioans really
has contracted coronavirus and thus has antibodies. If your agency wants a 2% margin of error
at a 95% confidence level, how many people should you have in your study?
b. A random sample of 10 regions in New England gave the following violent crime rates (per
million population):
3.5, 3.7, 4.0, 3.9, 3.3, 4.1, 1.8, 4.8. 2.9, 3.1
Another random sample of 12 regions in the Rocky Mountain states gave the following violent
crime rates (per million population):
3.7, 4.6, 4.5, 5.3, 3.3, 4.8, 3.5, 2.4, 3.1, 3.5, 5.2, 2.8
Find the 85% confidence interval for the difference between the average violent crime rate in
New England states and the average violent crime rate in Rocky Mountain states. State your interpretation and conclusion.
Step by step
Solved in 2 steps
