Exam (elaborations)
MAT 120 CHAPTER 8 AND 9 QUESTIONS AND 100% CORRECT ANSWERS 2024
- Module
- Institution
MAT 120 CHAPTER 8 AND 9 QUESTIONS AND 100% CORRECT ANSWERS 2024
[Show more]
Seller
Follow
brainscape
Reviews received
Content preview
MAT 120 CHAPTER 8 AND 9 QUESTIONSAND 100% CORRECT ANSWERS 2024
confidence interval with sigma known - ANSWER 1) find mean and sigma
2) find z-score
3)E= (Z x sigma) / square root N
4)add and subtract the mean and E
a survey of 85 home owners finds that they spend on average $67 a month on home
maintenance with a population standard deviation of $14. find the 90% confidence
interval for the mean amount spent on home maintenance by all homeowners -
ANSWER confidence interval with sigma known
a sample of 140 dieters reported that they cheated on their diet an average of 7 time a
week with sigma = 1.5. calculate a 95% confidence interval for the average number of
times dieters cheat on their diets each week - ANSWER confidence interval with sigma
known
confidence intervals with sigma unknown - ANSWER 1) find mean and s
2) d.f. = n - 1
3) t-score
4) E= ( t X s) / square root n
5) add and subtract the mean and E
a sample of 37 plane crashers finds that the average number of deaths was 49 with a
standard deviation of 15. find 99% confidence interval for the average number of deaths
per plane crash - ANSWER confidence intervals with sigma unknown
Determining the Minimum sample size - ANSWER 1) find z, sigma, and E
2) N = ((z X sigma) / E) ^2
a poll conducted on November 19 2007 by American research group inc asked
American adults how much they planned to spend on gifts for Christmas how many
subjects are needed to estimate the amount of planned Christmas spending within $5
with90% confidence initial survey results indicate that sigma = $82.25 - ANSWER
determining the minimum sample size
proportion confidence interval (percent) - ANSWER 1) find p hat, q hat, and n
2) z-score
3) E = z X square root ((p hat X q hat) / n)
out of 190 adults surveyed 71 exercise on a regular basis construct a 90% confidence
interval for the percentage of all adults who exercise on a regular basis - ANSWER
proportion confidence interval ( percent)
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 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 brainscape. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £4.85. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
81298 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
Recently viewed by you
