A medical researcher wants to investigate the amount oi time it takes for patients headache pain to be relieved a?er taking a new prescription painkiller, She plans to use statistical methods to estimate themean of the population of relief times, She believes that the population is normally distributed with a standard deviation of 18 minutes, How large a sample should she take to make an estimate within 2minutes of the mean time with 93% confidence?
Standard deviation
Plagiarism-free and delivered on time!
We are passionate about delivering quality essays.
Our writers know how to write on any topic and subject area while meeting all of your specific requirements.
Unlike most other services, we will do a free revision if you need us to make corrections even after delivery.