MATH 225N Week 6 Assignment; Confidence Interval for Mean – Population Standard Deviation Known (Version 2)
152 views 0 purchase
Course
MATH 225N (MATH225N)
Institution
Chamberlain College Of Nursing
1. Question: Suppose the germination periods, in days, for grass seed are normally distributed. If the population standard deviation is 3 days, what minimum sample size is needed to be 90% confident that the sample mean is within 1 day of the true population mean?
2. Question: The length, in words...
1. Suppose the germination periods, in days, for grass seed are normally distributed. If the
population standard deviation is 3 days, what minimum sample size is needed to be 90%
confident that the sample mean is within 1 day of the true population mean?
25 seeds
2. The length, in words, of the essays written for a contest are normally distributed with a
population standard deviation of 442 words and an unknown population mean. If a random
sample of 24 essays is taken and results in a sample mean of 1330 words, find a 99%
3. The lengths, in inches, of adult corn snakes are normally distributed with
a population standard deviation of 8 inches and an unknown population
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Milestonee. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $20.24. You're not tied to anything after your purchase.
