MATH 225N Week 6 quiz – Chamberlain College of Nursing | MATH225N Week 6 quiz – Graded A
2 views 0 purchase
Course
MATH 225N (MATH225N)
Institution
Chamberlain College Of Nursing
WEEK 6 QUIZ
QUESTION 1
·
1/1 POINTS
A statistics professor recently graded final exams for students in her introductory
statistics course. In a review of her grading, she found the mean score out
of points was a x¯=77x¯=77, with a margin of error of 10.10.
Construct a confidence interval...
math 225n week 6 quiz 2020 – chamberlain college of nursing | math225n week 6 quiz 2020 – graded a
math 225n week 6 quiz 2020 – chamberlain college of nursing
Written for
Chamberlain College Of Nursing
MATH 225N (MATH225N)
All documents for this subject (550)
Seller
Follow
Michael01
Reviews received
Content preview
WEEK 6 QUIZ
QUESTION 1
·
1/1 POINTS
A statistics professor recently graded final exams for students in her introductory
statistics course. In a review of her grading, she found the mean score out
of 100100 points was a x¯=77x¯=77, with a margin of error of 10.10.
Construct a confidence interval for the mean score (out of 100100 points) on the final
exam.
A confidence interval is an interval of values, centered on a point estimate, of the form
(pointestimate−marginof error,pointestimate+marginof error)
(pointestimate−marginof error,pointestimate+marginof error)
Using the given point estimate for the mean, x¯=77x¯=77 and margin of error 1010,
the confidence interval is:
(77−10,77+10)(67,87)(77−10,77+10)(67,87)
FEEDBACK
Content attribution- Opens a dialog
, QUESTION 2
·
1/1 POINTS
A random sample of adults were asked whether they prefer reading an e-book over a
printed book. The survey resulted in a sample proportion of p′=0.14p′=0.14, with a
sampling standard deviation of σp′=0.02σp′=0.02, who preferred reading an e-book.
Use the empirical rule to construct a 95%95% confidence interval for the true
proportion of adults who prefer e-books.
That is correct!
$$(0.10, 0.18)
Answer Explanation
Correct answers:
$\left(0.10,\ 0.18\right)$(0.10, 0.18)
By the Empirical Rule, a 95%95% confidence interval corresponds to a zz-score
of z=2z=2. Substituting the given values p′=0.14p′=0.14 and σp′=0.02σp
′=0.02, a confidence interval is
(p′−z⋅σp′,p′+z⋅σp′)(0.14−2⋅0.02,0.14+2⋅0.02)
(0.14−0.04,0.14+0.04)(0.10,0.18)(p′−z⋅σp′,p′+z⋅σp′)
(0.14−2⋅0.02,0.14+2⋅0.02)(0.14−0.04,0.14+0.04)(0.10,0.18)
FEEDBACK
Content attribution- Opens a dialog
QUESTION 3
·
1/1 POINTS
The pages per book in a library are normally distributed with an unknown population
mean. A random sample of books is taken and results in a 95%95% confidence
interval of (237,293)(237,293) pages.
What is the correct interpretation of the 95%95% confidence interval?
That is correct!
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 Michael01. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $15.99. You're not tied to anything after your purchase.
