Exam (elaborations)
MATH 225N WEEK 6 STATISTICS QUIZ WITH ANSWERS LATESTDOWNLOAD 2022
- Course
- Institution
MATH 225N WEEK 6 STATISTICS QUIZ WITH ANSWERS LATESTDOWNLOAD 2022
[Show more]
Seller
Follow
CERTIFIEDNURSE
Reviews received
Content preview
MATH 225N WEEK 6 STATISTICS QUIZ WITHANSWERS
Question
A company wants to determine a confidence interval for the average CPU time of its
teleprocessing transactions. A sample of 70 random transactions in milliseconds is given below.
Assume that the transaction times follow a normal distribution with a standard deviation of
600 milliseconds. Use Excel to determine a 98% confidence interval for the average CPU time
in milliseconds. Round your answers to the nearest integer and use ascending order.
A sample of 22 test-tubes tested for number of times they can be heated on a Bunsen burner before
they crack is given below. Assume the counts are normally distributed. Use Excel to construct a 99%
confidence interval for μ. Round your answers to two decimal places and use increasing order.
,Question
Suppose scores on exams in statistics are normally distributed with an unknown population
mean. A sample of 26 scores is given below. Use Excel to find a 90% confidence interval for
the true mean of statistics exam scores. Round your answers to one decimal place and use
increasing order.
Question
Suppose that the scores of bowlers in a particular league follow a normal distribution such that
the standard deviation of the population is 12. Find the 95% confidence interval of the mean
score for all bowlers in this league using the accompanying data set of 40 random scores.
Round your answers to two decimal places and use ascending order.
, Question
In a random sample of 350 attendees of a minor league baseball game, 184 said that they
bought food from the concession stand. Create a 95% confidence interval for the proportion of
fans who bought food from the concession stand. Use Excel to create the confidence interval,
rounding to four decimal places.
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 CERTIFIEDNURSE. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.00. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
80467 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now