100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
MATH 225N Week 6 Assignment; Estimating Sample Size for a Population Proportion £15.49   Add to cart

Other

MATH 225N Week 6 Assignment; Estimating Sample Size for a Population Proportion

 27 views  0 purchase

1. Question: Suppose an automotive repair company wants to determine the current percentage of customers who keep up with regular vehicle maintenance. How many customers should the company survey in order to be 90% confident that the estimated (sample) proportion is within 2 percentage points of th...

[Show more]

Preview 1 out of 5  pages

  • January 12, 2021
  • 5
  • 2020/2021
  • Other
  • Unknown
All documents for this subject (277)
avatar-seller
Milestonee
Week 6 Assignment: Estimating Sample Size
for a Population Proportion
1. Suppose an automotive repair company wants to determine the current percentage of
customers who keep up with regular vehicle maintenance. How many customers should the
company survey in order to be 90% confident that the estimated (sample) proportion is within
2 percentage points of the true population proportion of customers who keep up with regular
vehicle maintenance? 423

2. Suppose a shoe store wants to determine the current percentage of customers who are
males. How many customers should the company survey in order to be 90% confident that
the estimated (sample) proportion is within 3 percentage points of the true population
proportion of customers who are males? 752

3. Deborah wants to estimate the percentage of people who eat fast food at least once per
week. She wants to create a 90% confidence interval which has an error bound of at most
3%. How many people should be polled to create the confidence interval? 752

4. Suppose an automotive repair company wants to determine the current percentage of
customers who keep up with regular vehicle maintenance. How many customers should the
company survey in order to be 95% confident that the estimated (sample) proportion is within
5 percentage points of the true population proportion of customers who keep up with regular
vehicle maintenance? 385


5. Question
Suppose a clothing store wants to determine the current percentage of
customers who are over the age of forty. How many customers should the
company survey in order to be 92% confident that the estimated (sample)
proportion is within 3 percentage points of the true population proportion of
customers who are over the age of forty? 852


6. Suppose an automotive repair company wants to determine the current percentage of
customers who keep up with regular vehicle maintenance. How many customers should the
company survey in order to be 90% confident that the estimated (sample) proportion is within
5 percentage points of the true population proportion of customers who keep up with regular
vehicle maintenance? 271

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

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

Quick and easy check-out

You can quickly pay through credit card for the summaries. There is no membership needed.

Focus on what matters

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 £15.49. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

85443 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now

Start selling
£15.49
  • (0)
  Add to cart